To enter the engineering menu, dial the number *#*#3646633#*#* and click on Audio or install the program MTK Recovery and enter the engineer through the program menu.
Description of service menu items:
- BatteryLog- information about the battery (status, charge level, voltage, temperature, condition, etc.)
- touch screen- contains several submenus
- handwriting- a simple finger drawing on the screen, serves as a test of screen responsiveness
- Verification - PointVerification- screen calibration test, when you click on the marked point, it shows the error
- Verification - LineVerification- same as PointVerification, only draws lines from one point to another
- V erification - ShakingVerification- shake test
- GPRS- GPRS operation tests, PDP (Packet Data Protocol) test
- Audio- setting all volumes and everything related to sound, contains the following submenus:
- Set Mode- phone mode selection (Normal mode - normal mode, Headset mode - headset-headphones, Handfree mode - hands-free, most likely a bluetooth headset)
- normal mode- settings for normal mode
- Headset mode- settings for headphone mode
- Loud Speaker Mode- setting the speaker mode (the same Handfree mode?)
- Speech enhancement- adjustment/correction of speech signals
- debug info- information on debugging, the values are set via Parameter 0-15 and what they are responsible for is unknown.
- Speech logger- call recording. When you turn on "enable" after a conversation, it creates a file in the root of the sd-card with a name like this: Sun_Feb_2012__01_15_31.vm (Sunday_February_2012__time01_15_31.vm), I don’t know what these files are and how to open them. Folder /sdcard/speechlog (which is specified as File location) - does not automatically create if you create such a folder manually, after the conversation it will be empty. When you press the "play" button in the Speech Logger menu, all *.vm files created on the sd-card are shown, and after clicking on them, nothing happens.
- camera- contains several submenus
- A.F.E.M.- choice of test for the camera (AF - auto focus)
- Raw Capture- starts Raw capture test
- start preview- shows the image from the camera on the screen
- WiFi- contains several submenus:
- Tx- Wifi Tx Registers tests
- Rx- Wifi Rx Registers tests
- EEPROM is the firmware WiFi adapter and the ability to disable / enable via addresses (h, byte) of its function. Once again, I categorically do not advise you to try to change something, you can kill the WiFi adapter tightly and it will be very problematic to restore it, even if you make a "save as file" backup (for some reason, all values \u200b\u200bare saved as zero - 0000). I personally do not even suspect that we have an adapter installed.
- temperature sensor- WiFi adapter temperature test during operation
- MCR- it is possible to read/write Value(h) values at Addr(h) address
- Bluetooth- contains submenu:
- TX Only test- specify the values, click , then Done, passes the Bluetooth Tx Registers test
- test mode- includes test mode
- NetworkInfo- information about RR (what I don’t know) select a tick about what we want to see information about, then press the button on the phone, select Check Information, look.
- AutoAnswer- contains only the "enable-enable/disable-disable" button. This is an auto pick up of the handset incoming call(checked).
- YGPS- tests and information about yGPS
- AGPS- the only menu in Russian, AGPS settings
Audio section menu:
- Set Mode- profile selection
- normal mode– standard (general, normal) profile
- Headset mode- headset mode
- Loud Speaker Mode- loudspeaker mode
- Speech enhancement- speech signal correction mode
Before choosing the maximum possible values, make sure it doesn't create any sound problems. It is usually not recommended to set it to 0, as this can cause the effect of rattling and other noise + gives unnecessary additional load on the speakers.
Before changing values, always write down what the defaults were, so that in case of which you can return them.
We use Normal mode:
- You will see a menu with four positions, where the first item is the profile number.
- We leave FIR - 0 and do not touch it. Let's go down to the following settings.
- First, we set up the general volume modulation Tone, for this, in the Type menu section, select the Tone item (if it is not selected by default), then in the Value section below, set the volume value and click Set.
- Set to 1, but you can try different options from 0 to 100 - the higher the value, the quieter the sound, 0 is the maximum volume, however, it is not recommended to set 0, because the speakers will give out unpleasant side effects in the form of rattling and other bad things.
- Next, in the Type Side tone menu, and in no case do not touch it, otherwise you will hear yourself and not the interlocutor during the conversation. Or change the method of scientific poke at your own peril and risk
- Set Audio to 1
- Set Speech to 1
- In FM we put 1
- Set the Microphone to 12
- In Key tone it is by default 70 - did not change.
If it seems to you that the radio or music is playing quietly in the headphones, you can also edit the profile for the headset. Reboot your phone.
For many people, buying a new tablet or smartphone is a real event. Each owner expects that the new gadget will delight him for many years with reliable operation and the absence of problems associated with its operation.
And in this case, it does not matter who is the assembler of the device and what operating system is installed on it. But it often happens that modern mobile devices can hardly be called ideal.
Some time after the start of use, moments appear that the owner will probably want to fix in one way or another. Some are trying to finalize the software part of the mobile assistant to the ideal state. It all depends on what is considered ideal. One of the most accessible tools in the Android mobile operating system is the engineering menu.
Engineering menu Android: customization secrets
At the final stage of configuring the software shell of a mobile device running on the Android operating system, developers use the so-called engineering android menu. The engineering menu is understood as the interface of a special program that allows you to make changes to the operation of the device, as well as view information from sensors and perform technological tests. The thoughtless use of this element can lead to unpredictable consequences. Most often, access to the engineering menu is hidden from users. However, his secret is essentially already known to many. To understand how you can call the engineering menu, just spend a few minutes looking for recommendations.
Important Points
Exit to the engineering menu "Android" can not be performed on all mobile devices. In order to take advantage of its capabilities, you need to make sure that the gadget meets a number of requirements. Primarily, CPU devices must be manufactured by MediaTek. On many inexpensive Spreadtrum models, the popular Snapdragon from Qualcomm, and various Tegra Nvidia and Intel, it is useless to try to launch the engineering menu, since it is missing. You will not be able to achieve performance even if an appropriate application is provided.
In addition, various modified operating systems, such as the popular CyanogenMod, do not allow you to run the configuration program. This is due to the fact that initially these systems were developed for devices with Qualcomm processor, which do not support the Android engineering menu.
It is also desirable that the operating system be original or at least created on a basic basis. The application file itself must be present among the programs, being hidden from standard conductor. So, for example, some manufacturers of mobile gadgets, after making the necessary settings for the software part, simply delete the Android engineering menu. In this case, recommendations for using the engineering menu are useless.
Using Secret Combinations
To get into the engineering menu settings in the Android operating system, you can use several methods. It is impossible to say which of them is better, since a direct comparison would be incorrect. Let's consider each of these methods in turn. One of the oldest options, which was used in the "ancient" models of tablets and smartphones, is that in special program- dialer, the user had to dial the engineering menu code. The operation was carried out similarly to checking the balance on the account. If the device recognizes and accepts the combination, the setup application starts. Some mobile device manufacturers use their own modified code. That's why standard set won't work here. In other situations, to call the engineering menu, you must dial the following combination of characters "*#*# 36 46 63#*#*". That's all.
The usual way
Using a secret combination of characters may not be convenient in all cases. The user can simply forget the correct order of the numbers. In the case of a modified set, it will be easier to use the program instead of finding the correct order of the characters. One of the most famous apps is Mobile Uncle Tools. This application is distributed free of charge, so the user will not have problems finding and installing it. At the time of this writing, current version was 2.9.9 or build 3.1.4, which has additional support for new processors.
In order for the program to work correctly, the user will first need to get root rights on their gadget. To get root rights, you can use various applications, for example, SuperSu or KingRoot. In this article, we will not talk about the features of working with a rooted device, since this is a separate rather voluminous topic. When the application is launched, you will need to select the third item, which is called Engineer Mode. Next, in the window that opens, select "Work with MTK". When a question about granting root access appears, you need to confirm the operation.
Restoring access to engineering mode
In the event that the manufacturer of the mobile device has decided to prudently remove the configuration program in order to ensure the security of the operating system, it will be possible to install it again. To do this, the user will need to find an installer on the Internet that restores EngineerMode.apk. When you find this component, you will only have to install it. Due to the abundance of analogue clones, we will not indicate the exact name. You can simply copy the specified file to system folder(system\app). After performing these operations, you can use any of the following methods to access the engineering menu: you can dial a number or call the menu directly from the program interface. It is worth noting that the user will need root rights to perform this operation.
Miracle program and its possibilities
Setting up Android through the engineering menu opens up the possibility for the user to solve several important tasks at once. In particular, here you can adjust the sensitivity of the microphone and speaker volume, reduce power consumption, limit the scanning of unnecessary ranges and reduce the search time for satellites. Let's take a closer look at the above functions.
How to increase the volume?
The volume of the call using the engineering menu is increased quite simply. To do this, select the "Audio" section. You will see a list of available modes. The Ring subsection of the LoudSpeaker Mode section is responsible for the system speaker in the system. Do not change the value of the parameter in the first window. In the second window, you can set a higher value for the parameter. After finishing editing, click on the Set button, which is located here. Next, you need to restart the device, while correctly exiting the program.
Operator Frequencies
To optimize the power consumption of your mobile device, you can try disabling the scanning of unnecessary frequency bands. The standard frequencies for working in 2G and 3G networks in our country are 900 and 1800 MHz. A pair of 850 and 1900 MHz is responsible for the American standard. To enable or disable the band you do not need, you need to use the Band Mode item in the engineering menu. Here you need to alternately go to the settings for both SIM cards and check the boxes next to the desired items. Pressing the Set button serves as confirmation.
How to improve GPS?
To improve the performance of the global positioning system, you must select the Location item in the Android engineering menu. Next, use the Location Based Service item and open the EPO. Here you need to make sure that the Download and Enabled items are ticked. Then you need to return to the YGPA item, select the information section and press "Full" - "Cold" - "Restart" in turn. Then you need to select the item Satellites or "Satellites". Until the answer is fixed on the map. This whole procedure will take 2 to 5 minutes. You just have to exit the engineering menu, close the program and reboot the device.
Often in Chinese (and certainly not only Chinese) phones on the engineering menu, far from optimal volume settings for the speaker, headset (headphones) and microphone are set, and we will consider their correction in this article.
How to get into the engineering menu of an Android phone
To get into the engineering menu, open the dialer and enter special code: *#*#3646633#*#*
Also on some Android versions command can work *#15963#* and *#*#4636#*#*
If your phone's processor is not MTK, then different options are possible.
I will give the codes known to me for opening the engineering menu on different phones and tablets:
*#*#54298#*#* or *#*#3646633#*#* – smartphones based on the MTK processor
*#*#8255#*#* or *#*#4636#*#* –Samsung smartphones
*#*#3424#*#* or *#*#4636#*#* or *#*#8255#*#* – HTC smartphones
*#*#7378423#*#* – Sony smartphones
*#*#3646633#*#* – TEXET, Fly, Alcatel smartphones,
*#*#3338613#*#* or *#*#13411#*#* - smart phones, Alcatel, Philips
*#*#2846579#*#* or *#*#2846579159#*#* – Huawei smartphones
*#*#2237332846633#*#* - devices from Acer
Immediately after entering, the command should disappear and the engineering menu will open. But on some devices, you still need to press the "Call" key
A list of sections of the phone's engineering menu will appear.
Just in case, take a notebook and a pen and take notes on the settings that were set on your phone before your intervention. You never know, anything can happen.
On my phone (based on the MTK processor), to get to the engineering menu I had to install free utility(program) from " Mobileuncle MTK Tools", which opens access to the engineering menu (that is, it works similarly to dialing the magic combination *#*#3646633#*#*).
I'm sure you'll find it there free apps and for other phones.
Volume settings for the speaker, headset (headphones) and microphone of the phone through the engineering menu
For clarity, let's briefly analyze the volume setting of the device:
We go into the program or type a magic combination to enter the engineering menu. Next, in the menu that opens, select the section " Engineer Mode»
A section will open in which you can select the engineering menu of the Android system (we skip it), and the engineering menu of the phone itself.
We need the engineering menu of the phone, so we select the "Engineer Mode (MTK)" section. This point is circled in the figure with a red marker.
A very long menu will open, through which you can access almost any phone settings. But it's not enough to get to them, you need to know how to manage them.
So don't change what you have no idea about.
At worst, write down the parameters that were before your intervention, in order to return them later. We continue!
Since we are interested in setting the sound level, select the “Audio” item, I circled it with a red marker.
And… magic! The speaker and microphone settings menu that interests us opens.
And actually why did we climb into this menu? Is something not working out of curiosity? Okay, let's keep looking!
Here it is worth lingering and understanding what all these menu items mean.
normal mode(settings section in normal or normal mode) – this mode is active when nothing is connected to the smartphone;
Headset mode(headset mode) - this mode is activated after connecting headphones or external speakers;
Loud Speaker Mode(loudspeaker mode) - it is activated when nothing is connected to the phone or tablet, and you turn on speakerphone while talking on the phone;
Headset_LoudSpeaker Mode(loudspeaker mode when a headset is connected) - this mode is activated when headphones are connected to the phone or tablet or external speakers, and you turn on the speakerphone while talking on the phone;
Speech enhancement(Talking mode) - this mode is activated in the normal talking mode on the phone, and nothing is connected to it (headset, external speakers) and the speakerphone is not turned on.
debug info- it is not clear why - information on the backup of information or its debugging;
Speech logger- I didn’t fully figure it out, most likely, keeping a log during negotiations or recording a conversation. If you check the box next to "Enable speech log", then after completion phone call corresponding files are created in the root directory of the memory card. Their name and structure takes the following form: Day of week_month_year__hour_minutes_seconds (for example, Friday_July_2016__time17_12_53.pcm).
What these files serve for and how they can be useful to us is not clear. The directory /sdcard/VOIP_DebugInfo (which is the location for storing files with information on the backup) is not automatically created, if you create it manually, then after the conversation it will remain empty.
audio logger– Used to record sound that supports quick search, playback and save it.
When you enter any of the modes, you will have access to various settings volume (Type). Here is a list of the main settings you need to know:
- Sip - settings for Internet calls;
- Mic - microphone sensitivity settings;
- Sph - settings conversational speaker(the one that is applied to the ears);
- Sph2 - settings for the second conversational speaker (I don't have it on my phone);
- Sid - skip, when you change these parameters during negotiations on your smartphone or tablet, you can hear yourself instead of the interlocutor;
- Media – setting the multimedia volume level;
- Ring - setting the volume level of the incoming call;
- FMR - FM radio volume settings.
Under the item for selecting settings, a list of volume levels (Level) is available (see figure). 
There are usually 7 such levels, from level 0 to level 6. Each such level corresponds to one “click” on the volume rocker of your smartphone or tablet.
So level 0 is the quietest level and level 6 is the loudest signal level. Please note that each level can be assigned its own values, which are in the Value is 0~255 cell. They should not go beyond the range from 0 to 255 (the lower the value, the quieter the volume).
To change this parameter, you need to erase the old value in the cell and write a new one, and then press the “Set” button (the one next to the cell) to assign it. 
Finally, at the bottom you can see the Max Vol. 0~255 (on my smartphone, for example Max Vol. 0~255, it all depends on the manufacturer). This item sets the maximum value of the volume level, it is one for all levels.
Dear friends. Item names may vary different models. This is the MTK platform, so be prepared to use your brain and search for a match in your menu. My phone is Jiayu G3.
My changes were applied immediately, but someone may need to restart the phone for them to take effect.
Although, it seems, you shouldn’t break anything, and if you don’t like the changes, you can always enter the old value ..
But still..
ALL CHANGES YOU MAKE AT YOUR OWN RISK!!! Don't forget to turn on the thinker!
P.S.: I found the font size setting on my phone. It turns out you can still increase!
P.P.S.: if something is still not clear, then here is a video on setting up sound in the engineering menu:
Android smartphone manufacturers implement and use the engineering menu to test devices. It contains all kinds of tests and device settings that are not available to ordinary users. However, today, knowing the USSD command or downloading the application from PlayMarket, anyone can enter the engineering menu.
Why do you need a hidden engineering menu in Android
Engineering menu (Engineering Mode) - at its core hidden application, which is used by developers to test and set the optimal parameters for a mobile phone or tablet. Specialists check the operation of sensors and, if necessary, make adjustments to the functioning of system components.
When working with the Android technical menu, be careful - changing some of the functions leads to device malfunctions.
How to enter the menu
To open the menu set by the manufacturer, activate the dial pad on your smartphone and enter one of the USSD commands presented in the table. After entering the command, the numbers will disappear from the screen, and a menu will open instead.
In the dial pad, enter a combination of numbers and symbols to enter the menu
Table: combinations to start Engineering Mode
| Device manufacturer | Team |
| Sony | *#*#7378423#*#* |
| *#*#3646633#*#* | |
| *#*#3649547#*#* | |
| Philips | *#*#3338613#*#* |
| *#*#13411#*#* | |
| ZTE, Motorola | *#*#4636#*#* |
| HTC | *#*#3424#*#* |
| *#*#4636#*#* | |
| *#*#8255#*#* | |
| Samsung | *#*#197328640#*#* |
| *#*#4636#*#* | |
| *#*#8255#*#* | |
| Prestigio | *#*#3646633#*#* |
| LG | 3845#*855# |
| Huawei | *#*#2846579#*#* |
| *#*#14789632#*#* | |
| Alcatel, Fly, Texet | *#*#3646633#*#* |
| Smartphones and tablets with a MediaTek processor (most Chinese devices) | *#*#54298#*#* |
| *#*#3646633#*#* | |
| Acer | *#*#2237332846633#*#* |
Video: how to work in Engineer Mode
If the code does not work and in a standard way the service menu cannot be started, use third party applications- you can download them on Play Market. Recommended programs - "Start the MTK engineering menu", Mobileuncle Tools, Shortcut Master.
Manufacturers menu does not work on some device models with Android 4.2 JellyBean (x.x.1, x.x.2) and Android 5.1 Lollipop. Also the menu is invalid when installed firmware Cyanogen mod. In Android 4.4.2, the changes made in the application are reset on reboot.
"Launching the MTK engineering menu"
The application allows you to open and configure the engineering menu without a set of digital commands. Works correctly on MediaTek processors (MT6577, MT6589, etc.) and Android 2.x, 3.x, 4.x, 5.x systems. According to user reviews, the program successfully performs its functions, but after rebooting the smartphone, the settings made using the application are reset.
Mobileuncle Tools
The functionality of the application is similar to the previous one, but, in addition to accessing the engineering menu, the user gets the opportunity to view information about the screen, sensor and memory of the device, as well as update the firmware, restore the IMEI number and improve GPS. Root rights are required for stable operation.
To enter the engineering menu, select Engineer Mode
Shortcut Master Utility
The Shortcut Master program is designed to work with shortcuts and system applications: creating, searching, deleting. There is no direct function to enter the engineering menu. But with its help, you can view a list of secret commands that are active on your device. And by clicking on the name of the command, you will see a drop-down menu in which there will be an item "execute". Convenient and doesn't require any extra work.
In the program, call the additional menu and select the item Secret code explorer to see the list of codes
Root rights to access the engineering menu
To get into the service menu on some versions of Android, the user must have superuser (root) rights. You can get rights using specialized applications: Farmaroot, UniversalAndRoot, Romaster SU and others. To root your device with Farmaroot:
- Install and run the program. Link in Google Play: https://play.google.com/store/apps/details?id=com.farmaapps.filemanager&hl=en.
- If the application supports installing root rights on your device, then you will see a list of possible actions on the screen, among them - “Get root”. Select this item.
- Choose one of the preset root methods.
- The program will start installing.
- At the end of the procedure, you will see a message about the successful installing root access.
Instructions for obtaining root access through the Farmaroot application
Possible problems and solutions:
- the application closed in the middle of the installation - restart the device and try again;
- Root rights were not installed - try installing using a different method (choose a new exploit in the application).
What can be configured in the menu
The appearance of the engineering mode and the options for adjusting the parameters may vary depending on the model of the tablet or smartphone. In the menu, users most often adjust the sound, change the camera settings and use the recovery mode. The adjustment parameters and procedure are shown below. Be careful - the names of menu items may vary in different device models! You act at your own risk.
Audio: increase volume level
If your phone is not loud enough, find the Audio section in the engineering menu and go to LoudSpeaker Mode. Select Ring. For each signal level (level 1–6), change the values - set the numbers in ascending order, from 120 to 200. Increase the value in the Max. Vol - maximum 200. Press the SET button to save the settings.
Sequentially change the maximum volume values for each level
Audio: increase the volume of a telephone conversation
To boost the tone of the speaker for conversations, in the Audio section of the service menu, select Normal mode and open the Sph. Set the values for the signal levels (level 1–6) from 100 to 150, and the number for Max. Vol. - up to 160.
By adjusting the speaker volume, you will hear the interlocutor better during a call.
To increase the sensitivity of the microphone, go to the menu Audio - Normal mode - Mic. For each level, assign the same microphone sensitivity values, for example, 200. Press the SET button, reboot and see if the other person hears you better.
Increased microphone sensitivity will allow the interlocutor to hear you better
Video: adjusting sound settings in the engineering menu
Battery: disable unused frequencies
Smartphones quickly use up battery life for running applications, maintaining cellular communications and network connections. Using the engineering menu, you can increase the battery life.
Modern devices scan several GSM frequencies - 900/1800 MHz and 850/1900 MHz. In Russia, a pair of 900/1800 MHz operates, which means that there is no need to scan the network at other frequencies. The radio signal for the second pair can be turned off, which will significantly save the charge level.
In Engineer Mode, open the Band Mode item. Disable unused frequencies by unchecking the corresponding items - PCS1900 and GSM850. If the device supports two SIM cards, open SIM1 and SIM2 in turn and follow the steps in each. Press the SET button to save the settings.
Disabled frequencies save battery power
If your smartphone and SIM card work in 3G networks, disable networks that are not used in Russia: WCDMA-PCS 1900, WCDMA-800, WCDMA-CLR-850. Press the SET button again.
You can enable scanning of disabled networks by returning to the same menu and checking the boxes.
Camera: photo and video settings
By default, Android devices save pictures in JPEG format. Meanwhile, photographers tend to shoot and process their footage in RAW for more editing options. The technical menu allows you to select the desired image format.
Find Camera in the menu and select Capture Type. Set the photo format to RAW and press SET. Also in the Camera menu, you can increase the size of pictures, set the ISO value, enable shooting in HDR for higher photo detail, and set the frame rate for video. After changing each parameter, remember to press SET to save the settings.
recovery mode
recovery mode(Recovery mode) - analogue of Bios on a computer, allows you to manage the device without logging in to the Android system. Recovery Mode Features:
- resetting the settings to standard;
- firmware update;
- access to root rights;
- creation backup OS;
- removal of personal data from the system.
In Recovery Mode, do not perform an action if you are not sure what it will lead to. Some commands can harm the device and the system.
If the settings are not saved
Users who have access to the technical menu complain that the parameters changed in it are not activated or are reset when the device is restarted.
To activate the settings after changing the parameters, tap on the SET button at the bottom of the screen. If the parameters are reset after the device is rebooted, try entering the technical menu not through the application, but using a digital command.
After setting the settings, do not forget to press the SET button
Service codes for Android devices
In addition to the technical menu, secret USSD codes allow you to control the functionality of Android smartphones - combinations of numbers and symbols, by typing which the user performs an action. Secret codes for different devices are given in the table.
Table: list of secret commands for Android
| Manufacturer | Digital team | Meaning |
| Codes for most manufacturers | *#*#7780#*#* | Rollback settings and uninstall user applications |
| *2767*3855# | Firmware change, total rollback of settings. | |
| *#*#232339#*#* *#*#526#*#* |
Checking Wireless Connections | |
| *#*#34971539#*#* | Detailed information about the camera | |
| *#*#232338#*#* | View Wi-Fi Address | |
| *#*#273283*255*663282*#*#* | Activate media backup on your phone | |
| *#*#1472365#*#* | Express GPS test | |
| *#*#0*#*#* | Screen check | |
| *#*#2663#*#* | Viewing touchscreen information | |
| *#*#2664#*#* | Touchscreen testing | |
| *#*#4636#*#* | General device and battery data | |
| *#*#0673#*#* *#*#0289#*#* |
Audiotests | |
| *#*#7262626#*#* | GSM reception test | |
| *#*#0842#*#* | Vibration and display brightness test | |
| *#*#3264#*#* | Information about RAM memory | |
| *#*#232331#*#* | Bluetooth communication test | |
| *#*#8255#*#* | Checking Google Talk | |
| *#*#232337#*#* | Bluetooth address information | |
| *#*#1234#*#* | Firmware data of the device | |
| *#*#44336#*#* | Device build date | |
| *#06# | Information about the IMEI number | |
| *#*#197328640#*#* | Service activity test | |
| *#*#1111#*#* | Version of free-to-air programs | |
| *#*#2222#*#* | Iron number for free-to-air | |
| *#*#0588#*#* | Proximity sensor test | |
| Sony (unified commands operate on devices) | **05***# | Unblocking a PUK code |
| Motorola | *#06# | IMEI |
| *#*#786#*#* | Roll back settings to original | |
| *#*#1234#*#* *#*#7873778#*#* | Opening apps as root | |
| *#*#2432546#*#* | Check for updates | |
| *#*#2486#*#* | Entering the service menu | |
| HTC | *#*#4636#*#* | Service menu |
| 3282# | EPST System Application | |
| *#*#8255#*#* | G-talk monitor | |
| 33284# | Network status | |
| *#*#3424#*#* | Functional test | |
| 3424# | Device Diagnostics | |
| 7738# | Protocol Diagnostics | |
| 8626337# | Voice Coder | |
| Samsung (general codes effective) | 778 (+call) | EPST menu activation |
| LG (work with codes replaces the technical menu) | 3845#*855# | International Devices |
| 3845#*400# | Chinese devices | |
| 5689#*990# | Sprint | |
| 228378 (+ call) | Verizon Wireless | |
| 3845#*851# | T Mobile | |
| 3845#*850# | AT&T |
If for some reason the service code did not work, do not be discouraged - install and run the Secret Codes application (Google Play link: https://play.google.com/store/apps/details?id=fr.simon.marquis. secretcodes&hl=en). The program will analyze the combinations valid in the device and offer you a list. You can activate the combination directly in the application with one click on the name.
There are many ways to improve mobile device on Android using the engineering menu. The menu structure differs in different device models, but the basic functionality is preserved everywhere. When opening and changing parameters in the service section, be careful - some commands lead to system failures and device failure.
The engineering menu on Android devices is a special “embedded” application in the operating system that allows you to fine tuning devices. This is necessary to debug the operation of the hardware and, of course, software. But often users want to change any settings on their own. In this case, the question arises of how to enter the Android engineering menu. This can be done with special service codes or third-party software.
Developer menu: what are the possibilities
Settings and menu design on Android devices may differ depending on the phone manufacturer. In general, users resort to the help of the engineering menu for the following reasons:
- Audio settings on the phone (call volume, voice of the interlocutor during a call);
- Changing camera settings;
- Using recovery mode;
- Setting the microphone sensitivity;
- Disabling unused frequencies to save phone battery;
- Obtaining information about the MAC address of the device;
- Setting up Bluetooth and Wi-Fi.
The Android engineering menu provides the user with almost limitless possibilities. But you should always remember that only advanced users can use it. Changing some settings may cause your smartphone or tablet to not work properly. If you do not know what each menu item is directly responsible for, simply do not touch it.
The developer mode includes setting up Hardware Testing equipment, and also contains the following items:
- Audio - volume control in the phone's speakers.
- Camera - allows you to configure various camera settings (image size, type, and more).
- Diving current camera shows the current camera.
- CPU Stress Test produces a test load on the central processor.
- De-sense is a device manager that manages configuration settings.
- Display - setting the frequency of the outgoing signal.
- IO - setting up input / output operations.
- Memory - key information about memory.
- Power - information about the battery.
- SD Card Test - testing a memory card.
- TouchScreen - touch screen setting, sensitivity test.
- USB - operation test USB port on your phone.
In the Connectivity tab, you can get information about devices that work with the outside world. These include Bluetooth, Wi-Fi and FM module. The Log and Debugging tab allows you to view the battery log, set the debugger level, and run a special MTK log. In the Others tab, you can change fonts, as well as view the temperature of the processor and battery.
Entering the menu: using code combinations
To enter the engineering menu as quickly and easily as possible, you will need special engineering codes. Each manufacturer has its own combination that opens access to the engineering menu in Android.
To enter the menu, you need:
In most cases, this technique allows you to open the service menu. Below are some combinations for the most popular phones:
- Models from HTC - *#*#3424#*#*, *#*#4636#*#* or *#*#8255#*#*;
- Samsung devices - *#*#197328640#*#* or *#*#8255#*#*;
- Sony smartphones - *#*#3646633#*#*, *#*#7378423#*#* or *#*#3649547#*#*;
- Huawei phones - *#*#2846579#*#* or *#*#14789632#*#*;
- Mobile from ZTE - *#*#4636#*#*.
There is also a universal code that is suitable for most smartphones and tablets running on MTK processor. You can check your device's data sheet to see what processor you have. If this is a MediaTek (MTK) product, then try using the combination *#*#54298#*#* or *#*#3646633#*#*.
If it works, then you will see the developer menu in front of you. Some engineering codes on Android do not work in operating version 4.2.1 and 4.2.2.
Using Third Party Applications
How to enter the engineering menu on Android, if android codes does not work? There is a way. To enter the engineering menu, you will need one of the applications that will allow you to get into developer mode without entering a combination. There are several similar programs in the official Google Play store. One of them is "Launching the engineering menu of the MTK".
To use it, you need:
- Go to the "Play Market", while entering the name of the program in the search bar.
- Download and install it.
- Run on your phone.
After that, you will see a couple of tabs with various settings.
The application allows you to perform various tests (for example, a processor stress test), get information about the modem or memory, and much more. You can also make changes to the hardware. To do this, you only need to open the relevant sections and configure the settings. In this case, the phone will be on all the time.
An alternative is the Mobileuncle tools program. You can download it on the Internet. Install the application, and then go to the "Engineer Mode" submenu. Almost all menu items of the developer will be available in it.
Now you know how to turn on the mode android developer. It will help you quickly necessary settings or monitoring individual components smartphone.
Smartphones and tablets under Android control have many and interesting features hidden from prying eyes.
Why are they hidden? Firstly, so that an inexperienced user does not break anything, and secondly, they are needed in especially rare cases and are not used regularly. Today we will talk about the engineering menu.
What is it and why is it needed?
This is a special program that developers use at the final stage of configuration software platform mobile device. With it, they bring last changes into the operation of the device, check the operation various sensors and perform system component testing. Also, hidden functionality is used to obtain a large amount of system information and conduct various tests (about 25 pieces).
Attention! This section created for experienced users who bear full responsibility for the consequences.
The engineering menu is available on smartphones and tablets running on the MediaTek processor. On the Qualcomm chipset, it is either cut down or absent altogether.
How to open the engineering menu?
To enter the engineering menu, you need to enter a special command in the dialing application: *#*#3646633#*#*. On some versions, the code *#*#4636#*#* or *#15963#* may work.
If the code didn't work or you don't have a dialer app (relevant for tablets that don't support calls), the MobileUncle Tools or MTK Engineering apps, which can be downloaded for free from Google Play, will help.
Advanced Users modern smartphones and tablets use the many features that the Android engineering menu has. It allows you to get information about the mac-address, check or configure the operation of Wi-Fi, Bluetooth, update the software of the camera, speakers. Very often, using such a menu, you can improve the sound on your device and make other fine adjustments. For example, return the original settings Google account, specify settings for blocking and turning off the device, set settings that allow you to back up important information . Before entering the engineering menu, you need to understand that rash actions can lead to device failure. It is desirable for the user to remember what changes were made to the system in order to return all settings to their previous state if necessary.
How to enter the engineering menu using the standard features of the device?
List functionality can be opened by typing a certain combination of characters in the device call window. The Android engineering menu code varies depending on the brand of phone or tablet. Each manufacturer sets their own combination. Such information is usually indicated in the instructions for the phone and on official websites. Users of modern devices usually have no difficulty finding the right code.
Below we provide a table of the most common combinations. It is not recommended to use them if your device does not belong to the listed brands.
Developers do not recommend executing such commands without certain knowledge and experience. But often only this method helps to quickly solve a number of problems associated with returning the device to its original state, receiving additional information about the device. The engineering menu is presented in English, which makes it understandable for most users.
Using additional programs
It is not always possible to find out the combination that is suitable directly for your device. In such situations, you can install special software on your mobile device that will allow you to open a list of smartphone or tablet functionality with a few clicks. It is publicly available for different Android versions and device models.
The program for entering the Android engineering menu can be installed via a USB connection to personal computer or laptop. One of them is called Mediatek Engineer Mode. It is an EnMode.apk file, which must be transferred to the device's memory and installed in the usual way. Such a program is suitable for devices based on the MTK processor. The user has the opportunity to download a free and paid version of the software. 
The Google Play store has the ability to download the Mobileuncle MTK Tools utility. It is designed for smartphones and tablets running Android 2.1. and more later versions. The description says that such a utility is also only suitable for devices equipped with an MTK processor.
For owners, the Mobileuncle Tools program is like. There are other utilities, for example, Shortcut Master, MTK engineering menu, MTK engineering menu launch. Before installing them, we recommend that you read the rating of the application, reviews of other users, and also check your device for compatibility.
Setting the optimal sound by opening the engineering menu
One of the most common causes, because of which users are looking for information on how to enter the engineering menu, is the need to fine-tune the sound. The following situations may occur:
- Poor hearing when speakerphone is on
- Sudden drops in sound during an incoming call while listening to audio
- Insufficient signal volume
- Quiet sounds during video recording
- Quiet operation of the headset and microphone.
This is just a small list of installed settings, which can be changed through the engineering menu of a modern mobile device. Sound settings are carried out through the Audio section, which is displayed immediately after entering the menu. Then various tabs will appear on the screen, such as Headset Mode. This tab allows you to set the audio options that are activated when a headset is connected. Normal Mode sets the sound in the normal state of the mobile device (without connecting headphones, speakers).
LoudSpeaker Mode tab, which are activated when the loudspeaker is turned on. Headset LoudSpeaker Mode allows you to make settings for the active speaker mode while a headset is connected to it. The Speech Enhancement tab provides settings that come into play when talking over a mobile network.
In any of the modes, you can fine-tune the microphone or increase the volume (see table).
The volume of any sound parameter has seven levels - from 0 to 6. The higher this value, the louder your device will sound. We do not recommend setting the maximum settings, as this contributes to the fast. In many devices, setting the volume to the maximum level can lead to unpleasant noises.
The engineering menu is a mechanism for fine-tuning mobile devices operating on the Android platform. For developers, the list of such features opens up new options when deploying applications. Of course, such a menu is used not only to adjust the sound parameters. It is important tool supporting optimal performance smartphones and tablets. But it's best not to make changes you're not sure about.
Often in Chinese (yes, for sure, and not only Chinese) phones on Android based in the engineering menu, far from optimal volume settings for the speaker, headset (headphones) and ...
Often in Chinese (and certainly not only Chinese) Android phones in the engineering menu, far from optimal volume settings for the speaker, headset (headphones) and ...
The engineering menu on phones with the Android operating system gives access to advanced features and settings. Experienced smartphone users prefer to use the engineering menu for more comfortable operation. On many Chinese-made smartphones, the mode is available by default. In other cases, users have to get to the settings on their own.
Why it may not work to enter the engineering menu
If the user on the smartphone does not have such a mode, most likely, he is the owner without default access to the engineering menu. This problem is solvable. There are special USSD commands and applications that allow access to advanced device settings.
Sign in with a code
The codes for entering the engineering menu are similar in structure to USSD requests. On many smartphones, universal codes work, on others there are special ones provided by a specific manufacturer.
| The code | Manufacturer |
| *#*#3646633#*#* | Universal |
| *#15963#* | Universal |
| *#*#4636#*#* | Universal |
| *#*#54298#*#*, *#*#3646633#*#* | Processor MTK |
| #*#8255#*#* , *#*#4636#*#* | Samsung |
| *#*#3424#*#*, *#*#4636#*#* , *#*#8255#*#* | NTS |
| *#*#7378423#*#* | Sony |
| *#*#3646633#*#* | Alcatel, Fly |
| *#*#3338613#*#* , *#*#13411#*#* | Alcatel, Fly, Philips |
| *#*#2846579#*#* , *#*#2846579159#*#* | Huawei |
| *#*#2237332846633#*#* | Acer |
As soon as the user enters the code combination, the engineering menu should open. Codes are entered in dialing mode, you do not need to press the call button.
Installing a Third Party Application
In rare cases, the codes do not fit. You can try to install a third-party application or program, using them to access the engineering menu.
Launching the MTK engineering menu
A simple free application for smartphones, you can download. Immediately after launch, the application gives access to the engineering menu, control is carried out in the MTK interface.
Mobileuncle MTK Tools
The application is also installed on a smartphone. Download . After launching Mobileuncle MTK Tools gives access to the engineering menu. Supports English language, but you can find assemblies in Russian.
Works stably in Taiwanese mobile processors MTK.
MTK Engineering Mode
A lightweight application with a simple interface. You can download for free. The use is also free.
The app is like previous version, but easier to operate and configure. Initially it is in English.
Shortcut Master
The software can be downloaded from Google Play, here. The simplified version is free, but it is enough for full-fledged work with the engineering menu. Unlike previous applications, Shortcut Master can be immediately found in Russian.
Installing custom firmware
Custom builds of Android, for the most part, provide access to the engineering menu. They can be found on forums and developer websites.
It is important to remember that custom firmware, although it has certain advantages for advanced users, is dangerous. At incorrect installation or a crooked assembly, the smartphone owner risks losing important system data and personal files. They can be restored, but this threatens with additional problems.
The engineering menu on Android devices is a special "wired" application in the operating system that allows you to fine-tune the device. This is necessary to debug the operation of the hardware and, of course, software. But often users want to change any settings on their own. In this case, the question arises of how to enter the Android engineering menu. This can be done with special service codes or third-party software.
Developer menu: what are the possibilities
Settings and menu design on Android devices may differ depending on the phone manufacturer. In general, users resort to the help of the engineering menu for the following reasons:
- Audio settings on the phone (call volume, voice of the interlocutor during a call);
- Changing camera settings;
- Using recovery mode;
- Setting the microphone sensitivity;
- Disabling unused frequencies to save phone battery;
- Obtaining information about the MAC address of the device;
- Setting up Bluetooth and Wi-Fi.
The Android engineering menu provides the user with almost limitless possibilities. But you should always remember that only advanced users can use it. Changing some settings may cause your smartphone or tablet to not work properly. If you do not know what each menu item is directly responsible for, simply do not touch it.
The developer mode includes setting up Hardware Testing equipment, and also contains the following items:
- Audio - volume control in the phone's speakers.
- Camera - allows you to configure various camera settings (image size, type, and more).
- Diving current camera shows the current camera.
- CPU Stress Test produces a test load on the central processor.
- De-sense is a device manager that manages configuration settings.
- Display - setting the frequency of the outgoing signal.
- IO - setting up input / output operations.
- Memory - key information about memory.
- Power - information about the battery.
- SD Card Test - testing a memory card.
- TouchScreen - touch screen setting, sensitivity test.
- USB - testing the operation of the USB port on your phone.
In the Connectivity tab, you can get information about devices that work with the outside world. These include Bluetooth, Wi-Fi and FM module. The Log and Debugging tab allows you to view the battery log, set the debugger level, and run a special MTK log. In the Others tab, you can change fonts, as well as view the temperature of the processor and battery.
Entering the menu: using code combinations
To enter the engineering menu as quickly and easily as possible, you will need special engineering codes. Each manufacturer has its own combination that opens access to the engineering menu in Android.
To enter the menu, you need:
In most cases, this technique allows you to open the service menu. Below are some combinations for the most popular phones:
- Models from HTC - *#*#3424#*#*, *#*#4636#*#* or *#*#8255#*#*;
- Samsung devices - *#*#197328640#*#* or *#*#8255#*#*;
- Sony smartphones - *#*#3646633#*#*, *#*#7378423#*#* or *#*#3649547#*#*;
- Huawei phones - *#*#2846579#*#* or *#*#14789632#*#*;
- Mobile from ZTE - *#*#4636#*#*.
There is also a universal code that is suitable for most smartphones and tablets running on the MTK processor. You can check your device's data sheet to see what processor you have. If this is a MediaTek (MTK) product, then try using the combination *#*#54298#*#* or *#*#3646633#*#*.
If it works, then you will see the developer menu in front of you. Some engineering codes on Android do not work in operating version 4.2.1 and 4.2.2.
Using Third Party Applications
How to enter the engineering menu on Android if Android codes do not work? There is a way. To enter the engineering menu, you will need one of the applications that will allow you to get into developer mode without entering a combination. There are several similar programs in the official Google Play store. One of them is "Launching the engineering menu of the MTK".
To use it, you need:
- Go to the "Play Market", while entering the name of the program in the search bar.
- Download and install it.
- Run on your phone.
After that, you will see a couple of tabs with various settings.
The application allows you to perform various tests (for example, a processor stress test), get information about the modem or memory, and much more. You can also make changes to the hardware. To do this, you only need to open the relevant sections and configure the settings. In this case, the phone will be on all the time.
An alternative is the Mobileuncle tools program. You can download it on the Internet. Install the application, and then go to the "Engineer Mode" submenu. Almost all menu items of the developer will be available in it.
Now you know how you can enable Android developer mode. It will help you quickly make the necessary settings or monitor individual smartphone components.
Smartphones and tablets running Android have many interesting features hidden from prying eyes.
Why are they hidden? Firstly, so that an inexperienced user does not break anything, and secondly, they are needed in especially rare cases and are not used regularly. Today we will talk about the engineering menu.
What is it and why is it needed?
This is a special program that developers use at the final stage of configuring the software platform of a mobile device. With it, they make the latest changes to the operation of the device, check the functioning of various sensors and perform testing of system components. Also, hidden functionality is used to obtain a large amount of system information and conduct various tests (about 25 pieces).
Attention! This section is intended for advanced users who are fully responsible for the consequences.
The engineering menu is available on smartphones and tablets running on the MediaTek processor. On the Qualcomm chipset, it is either cut down or absent altogether.
How to open the engineering menu?
To enter the engineering menu, you need to enter a special command in the dialing application: *#*#3646633#*#*. On some versions, the code *#*#4636#*#* or *#15963#* may work.
If the code didn't work or you don't have a dialer app (relevant for tablets that don't support calls), the MobileUncle Tools or MTK Engineering apps, which can be downloaded for free from Google Play, will help.
Often in Chinese (and certainly not only Chinese) Android phones in the engineering menu, far from optimal volume settings for the speaker, headset (headphones) and microphone are set, and we will consider their correction in this article.
How to get into the engineering menu of an Android phone
To get into the engineering menu, open the dialer and enter a special code: *#*#3646633#*#*
Also, on some versions of Android, the command may work *#15963#* and *#*#4636#*#*
If your phone's processor is not MTK, then different options are possible.
I will give the codes known to me for opening the engineering menu on different phones and tablets:
*#*#54298#*#* or *#*#3646633#*#* – smartphones based on the MTK processor
*#*#8255#*#* or *#*#4636#*#* –Samsung smartphones
*#*#3424#*#* or *#*#4636#*#* or *#*#8255#*#* – HTC smartphones
*#*#7378423#*#* – Sony smartphones
*#*#3646633#*#* – TEXET, Fly, Alcatel smartphones,
*#*#3338613#*#* or *#*#13411#*#* - smartphones Fly, Alcatel, Philips
*#*#2846579#*#* or *#*#2846579159#*#* – Huawei smartphones
*#*#2237332846633#*#* - devices from Acer
Immediately after entering, the command should disappear and the engineering menu will open. But on some devices, you still need to press the "Call" key
A list of sections of the phone's engineering menu will appear.
Just in case, take a notebook and a pen and take notes on the settings that were set on your phone before your intervention. You never know, anything can happen.
On my phone (based on the MTK processor), in order to get to the engineering menu, I had to install a free utility (program) from Google Play " Mobileuncle MTK Tools", which opens access to the engineering menu (that is, it works similarly to dialing the magic combination *#*#3646633#*#*).
I am sure that you will also find free applications for other phones there.
Volume settings for the speaker, headset (headphones) and microphone of the phone through the engineering menu
For clarity, let's briefly analyze the volume setting of the device:
We go into the program or type a magic combination to enter the engineering menu. Next, in the menu that opens, select the section " Engineer Mode»
A section will open in which you can select the engineering menu of the Android system (we skip it), and the engineering menu of the phone itself.
We need the engineering menu of the phone, so we select the "Engineer Mode (MTK)" section. This point is circled in the figure with a red marker.
A very long menu will open, through which you can access almost any phone settings. But it's not enough to get to them, you need to know how to manage them.
So don't change what you have no idea about.
At worst, write down the parameters that were before your intervention, in order to return them later. We continue!
Since we are interested in setting the sound level, select the “Audio” item, I circled it with a red marker.
And… magic! The speaker and microphone settings menu that interests us opens.
And actually why did we climb into this menu? Is something not working out of curiosity? Okay, let's keep looking!
Here it is worth lingering and understanding what all these menu items mean.
normal mode(settings section in normal or normal mode) – this mode is active when nothing is connected to the smartphone;
Headset mode(headset mode) - this mode is activated after connecting headphones or external speakers;
Loud Speaker Mode(loudspeaker mode) - it is activated when nothing is connected to the phone or tablet, and you turn on the speakerphone while talking on the phone;
Headset_LoudSpeaker Mode(loudspeaker mode when a headset is connected) - this mode is activated if headphones or external speakers are connected to the phone or tablet, and you turn on the speakerphone while talking on the phone;
Speech enhancement(Talking mode) - this mode is activated in the normal talking mode on the phone, and nothing is connected to it (headset, external speakers) and the speakerphone is not turned on.
debug info- it is not clear why - information on the backup of information or its debugging;
Speech logger- I didn’t fully figure it out, most likely, keeping a log during negotiations or recording a conversation. If you check the box next to "Enable speech log", then after the end of the phone call, the corresponding files are created in the root directory of the memory card. Their name and structure takes the following form: Day of week_month_year__hour_minutes_seconds (for example, Friday_July_2016__time17_12_53.pcm).
What these files serve for and how they can be useful to us is not clear. The directory /sdcard/VOIP_DebugInfo (which is the location for storing files with information on the backup) is not automatically created, if you create it manually, then after the conversation it will remain empty.
audio logger– Used to record sound that supports quick search, playback and save it.
When you enter any of the modes, you will have access to various volume settings (Type). Here is a list of the main settings you need to know:
- Sip - settings for Internet calls;
- Mic - microphone sensitivity settings;
- Sph - settings for the conversational speaker (the one that is applied to the ears);
- Sph2 - settings for the second conversational speaker (I don't have it on my phone);
- Sid - skip, when you change these parameters during negotiations on your smartphone or tablet, you can hear yourself instead of the interlocutor;
- Media – setting the multimedia volume level;
- Ring - setting the volume level of the incoming call;
- FMR - FM radio volume settings.
Under the item for selecting settings, a list of volume levels (Level) is available (see figure).
There are usually 7 such levels, from level 0 to level 6. Each such level corresponds to one “click” on the volume rocker of your smartphone or tablet.
So level 0 is the quietest level and level 6 is the loudest signal level. Please note that each level can be assigned its own values, which are in the Value is 0~255 cell. They should not go beyond the range from 0 to 255 (the lower the value, the quieter the volume).
To change this parameter, you need to erase the old value in the cell and write a new one, and then press the “Set” button (the one next to the cell) to assign it.
Finally, at the bottom you can see the Max Vol. 0~255 (on my smartphone, for example Max Vol. 0~255, it all depends on the manufacturer). This item sets the maximum value of the volume level, it is one for all levels.
Dear friends. Item names may vary depending on the model. This is the MTK platform, so be prepared to use your brain and search for a match in your menu. My phone is Jiayu G3.
My changes were applied immediately, but someone may need to restart the phone for them to take effect.
Although, it seems, you shouldn’t break anything, and if you don’t like the changes, you can always enter the old value ..
But still..
ALL CHANGES YOU MAKE AT YOUR OWN RISK!!! Don't forget to turn on the thinker!
P.S.: I found the font size setting on my phone. It turns out you can still increase!
P.P.S.: if something is still not clear, then here is a video on setting up sound in the engineering menu:
Android smartphone manufacturers implement and use the engineering menu to test devices. It contains all kinds of tests and device settings that are not available to ordinary users. However, today, knowing the USSD command or downloading the application from PlayMarket, anyone can enter the engineering menu.
Why do you need a hidden engineering menu in Android
The Engineering Menu (Engineering Mode) is an inherently hidden application that developers use to test and set the optimal parameters for a mobile phone or tablet. Specialists check the operation of sensors and, if necessary, make adjustments to the functioning of system components.
When working with the Android technical menu, be careful - changing some of the functions leads to device malfunctions.
How to enter the menu
To open the menu set by the manufacturer, activate the dial pad on your smartphone and enter one of the USSD commands presented in the table. After entering the command, the numbers will disappear from the screen, and a menu will open instead.
In the dial pad, enter a combination of numbers and symbols to enter the menu
Table: combinations to start Engineering Mode
| Device manufacturer | Team |
| Sony | *#*#7378423#*#* |
| *#*#3646633#*#* | |
| *#*#3649547#*#* | |
| Philips | *#*#3338613#*#* |
| *#*#13411#*#* | |
| ZTE, Motorola | *#*#4636#*#* |
| HTC | *#*#3424#*#* |
| *#*#4636#*#* | |
| *#*#8255#*#* | |
| Samsung | *#*#197328640#*#* |
| *#*#4636#*#* | |
| *#*#8255#*#* | |
| Prestigio | *#*#3646633#*#* |
| LG | 3845#*855# |
| Huawei | *#*#2846579#*#* |
| *#*#14789632#*#* | |
| Alcatel, Fly, Texet | *#*#3646633#*#* |
| Smartphones and tablets with a MediaTek processor (most Chinese devices) | *#*#54298#*#* |
| *#*#3646633#*#* | |
| Acer | *#*#2237332846633#*#* |
Video: how to work in Engineer Mode
If the code does not work, and you cannot start the service menu in the standard way, use third-party applications - you can download them on PlayMarket. Recommended programs - "Start the MTK engineering menu", Mobileuncle Tools, Shortcut Master.
Manufacturers menu does not work on some device models with Android 4.2 JellyBean (x.x.1, x.x.2) and Android 5.1 Lollipop. Also, the menu is invalid when the Cyanogen Mod firmware is installed. In Android 4.4.2, the changes made in the application are reset on reboot.
"Launching the MTK engineering menu"
The application allows you to open and configure the engineering menu without a set of digital commands. Works correctly on MediaTek processors (MT6577, MT6589, etc.) and Android 2.x, 3.x, 4.x, 5.x systems. According to user reviews, the program successfully performs its functions, but after rebooting the smartphone, the settings made using the application are reset.
Mobileuncle Tools
The functionality of the application is similar to the previous one, but, in addition to accessing the engineering menu, the user gets the opportunity to view information about the screen, sensor and memory of the device, as well as update the firmware, restore the IMEI number and improve GPS. Root rights are required for stable operation.
To enter the engineering menu, select Engineer Mode
Shortcut Master Utility
The Shortcut Master program is designed to work with shortcuts and system applications: creating, searching, deleting. There is no direct function to enter the engineering menu. But with its help, you can view a list of secret commands that are active on your device. And by clicking on the name of the command, you will see a drop-down menu in which there will be an item "execute". Convenient and doesn't require any extra work.
In the program, call the additional menu and select the item Secret code explorer to see the list of codes
Root rights to access the engineering menu
To get into the service menu on some versions of Android, the user must have superuser (root) rights. You can get rights using specialized applications: Farmaroot, UniversalAndRoot, Romaster SU and others. To root your device with Farmaroot:
- Install and run the program. Link on Google Play: https://play.google.com/store/apps/details?id=com.farmaapps.filemanager&hl=en.
- If the application supports installing root rights on your device, then you will see a list of possible actions on the screen, among them - “Get root”. Select this item.
- Choose one of the preset root methods.
- The program will start installing.
- At the end of the procedure, you will see a message about the successful installation of root access.
Instructions for obtaining root access through the Farmaroot application
Possible problems and solutions:
- the application closed in the middle of the installation - restart the device and try again;
- Root rights were not installed - try installing using a different method (choose a new exploit in the application).
What can be configured in the menu
The appearance of the engineering mode and the options for adjusting the parameters may vary depending on the model of the tablet or smartphone. In the menu, users most often adjust the sound, change the camera settings and use the recovery mode. The adjustment parameters and procedure are shown below. Be careful - the names of menu items may vary in different device models! You act at your own risk.
Audio: increase volume level
If your phone is not loud enough, find the Audio section in the engineering menu and go to LoudSpeaker Mode. Select Ring. For each signal level (level 1–6), change the values - set the numbers in ascending order, from 120 to 200. Increase the value in the Max. Vol - maximum 200. Press the SET button to save the settings.
Sequentially change the maximum volume values for each level
Audio: increase the volume of a telephone conversation
To boost the tone of the speaker for conversations, in the Audio section of the service menu, select Normal mode and open the Sph. Set the values for the signal levels (level 1–6) from 100 to 150, and the number for Max. Vol. - up to 160.
By adjusting the speaker volume, you will hear the interlocutor better during a call.
To increase the sensitivity of the microphone, go to the menu Audio - Normal mode - Mic. For each level, assign the same microphone sensitivity values, for example, 200. Press the SET button, reboot and see if the other person hears you better.
Increased microphone sensitivity will allow the interlocutor to hear you better
Video: adjusting sound settings in the engineering menu
Battery: disable unused frequencies
Smartphones quickly use up battery life for running applications, maintaining cellular communications and network connections. Using the engineering menu, you can increase the battery life.
Modern devices scan several GSM frequencies - 900/1800 MHz and 850/1900 MHz. In Russia, a pair of 900/1800 MHz operates, which means that there is no need to scan the network at other frequencies. The radio signal for the second pair can be turned off, which will significantly save the charge level.
In Engineer Mode, open the Band Mode item. Disable unused frequencies by unchecking the corresponding items - PCS1900 and GSM850. If the device supports two SIM cards, open SIM1 and SIM2 in turn and follow the steps in each. Press the SET button to save the settings.
Disabled frequencies save battery power
If your smartphone and SIM card work in 3G networks, disable networks that are not used in Russia: WCDMA-PCS 1900, WCDMA-800, WCDMA-CLR-850. Press the SET button again.
You can enable scanning of disabled networks by returning to the same menu and checking the boxes.
Camera: photo and video settings
By default, Android devices save pictures in JPEG format. Meanwhile, photographers tend to shoot and process their footage in RAW for more editing options. The technical menu allows you to select the desired image format.
Find Camera in the menu and select Capture Type. Set the photo format to RAW and press SET. Also in the Camera menu, you can increase the size of pictures, set the ISO value, enable shooting in HDR for higher photo detail, and set the frame rate for video. After changing each parameter, remember to press SET to save the settings.
recovery mode
Recovery Mode (Recovery mode) - an analogue of Bios on a computer, allows you to manage the device without logging into the Android system. Recovery Mode Features:
- resetting the settings to standard;
- firmware update;
- access to root rights;
- creating a backup copy of the OS;
- removal of personal data from the system.
In Recovery Mode, do not perform an action if you are not sure what it will lead to. Some commands can harm the device and the system.
If the settings are not saved
Users who have access to the technical menu complain that the parameters changed in it are not activated or are reset when the device is restarted.
To activate the settings after changing the parameters, tap on the SET button at the bottom of the screen. If the parameters are reset after the device is rebooted, try entering the technical menu not through the application, but using a digital command.
After setting the settings, do not forget to press the SET button
Service codes for Android devices
In addition to the technical menu, secret USSD codes allow you to control the functionality of Android smartphones - combinations of numbers and symbols, by typing which the user performs an action. Secret codes for different devices are shown in the table.
Table: list of secret commands for Android
| Manufacturer | Digital team | Meaning |
| Codes for most manufacturers | *#*#7780#*#* | Rollback settings and uninstall user applications |
| *2767*3855# | Firmware change, total rollback of settings. | |
| *#*#232339#*#* *#*#526#*#* |
Checking Wireless Connections | |
| *#*#34971539#*#* | Detailed information about the camera | |
| *#*#232338#*#* | View Wi-Fi Address | |
| *#*#273283*255*663282*#*#* | Activate media backup on your phone | |
| *#*#1472365#*#* | Express GPS test | |
| *#*#0*#*#* | Screen check | |
| *#*#2663#*#* | Viewing touchscreen information | |
| *#*#2664#*#* | Touchscreen testing | |
| *#*#4636#*#* | General device and battery data | |
| *#*#0673#*#* *#*#0289#*#* |
Audiotests | |
| *#*#7262626#*#* | GSM reception test | |
| *#*#0842#*#* | Vibration and display brightness test | |
| *#*#3264#*#* | Information about RAM memory | |
| *#*#232331#*#* | Bluetooth communication test | |
| *#*#8255#*#* | Checking Google Talk | |
| *#*#232337#*#* | Bluetooth address information | |
| *#*#1234#*#* | Firmware data of the device | |
| *#*#44336#*#* | Device build date | |
| *#06# | Information about the IMEI number | |
| *#*#197328640#*#* | Service activity test | |
| *#*#1111#*#* | Version of free-to-air programs | |
| *#*#2222#*#* | Iron number for free-to-air | |
| *#*#0588#*#* | Proximity sensor test | |
| Sony (unified commands operate on devices) | **05***# | Unblocking a PUK code |
| Motorola | *#06# | IMEI |
| *#*#786#*#* | Roll back settings to original | |
| *#*#1234#*#* *#*#7873778#*#* | Opening apps as root | |
| *#*#2432546#*#* | Check for updates | |
| *#*#2486#*#* | Entering the service menu | |
| HTC | *#*#4636#*#* | Service menu |
| 3282# | EPST System Application | |
| *#*#8255#*#* | G-talk monitor | |
| 33284# | Network status | |
| *#*#3424#*#* | Functional test | |
| 3424# | Device Diagnostics | |
| 7738# | Protocol Diagnostics | |
| 8626337# | Voice Coder | |
| Samsung (general codes effective) | 778 (+call) | EPST menu activation |
| LG (work with codes replaces the technical menu) | 3845#*855# | International Devices |
| 3845#*400# | Chinese devices | |
| 5689#*990# | Sprint | |
| 228378 (+ call) | Verizon Wireless | |
| 3845#*851# | T Mobile | |
| 3845#*850# | AT&T |
If for some reason the service code did not work, do not be discouraged - install and run the Secret Codes application (Google Play link: https://play.google.com/store/apps/details?id=fr.simon.marquis. secretcodes&hl=en). The program will analyze the combinations valid in the device and offer you a list. You can activate the combination directly in the application with one click on the name.
There are many ways to improve a mobile device on Android using the engineering menu. The menu structure differs in different device models, but the basic functionality is preserved everywhere. When opening and changing parameters in the service section, be careful - some commands lead to system failures and device failure.
To enter the engineering menu, dial the number *#*#3646633#*#* and click on Audio or install the program MTK Recovery and enter the engineer through the program menu.
Description of service menu items:
- BatteryLog- information about the battery (status, charge level, voltage, temperature, condition, etc.)
- touch screen- contains several submenus
- handwriting- a simple finger drawing on the screen, serves as a test of screen responsiveness
- Verification - PointVerification- screen calibration test, when you click on the marked point, it shows the error
- Verification - LineVerification- same as PointVerification, only draws lines from one point to another
- V erification - ShakingVerification- shake test
- GPRS- GPRS operation tests, PDP (Packet Data Protocol) test
- Audio- setting all volumes and everything related to sound, contains the following submenus:
- Set Mode- phone mode selection (Normal mode - normal mode, Headset mode - headset-headphones, Handfree mode - hands-free, most likely a bluetooth headset)
- normal mode- settings for normal mode
- Headset mode- settings for headphone mode
- Loud Speaker Mode- setting the speaker mode (the same Handfree mode?)
- Speech enhancement- adjustment/correction of speech signals
- debug info- information on debugging, the values are set via Parameter 0-15 and what they are responsible for is unknown.
- Speech logger- call recording. When you turn on "enable" after a conversation, it creates a file in the root of the sd-card with a name like this: Sun_Feb_2012__01_15_31.vm (Sunday_February_2012__time01_15_31.vm), I don’t know what these files are and how to open them. Folder /sdcard/speechlog (which is specified as File location) - does not automatically create if you create such a folder manually, after the conversation it will be empty. When you press the "play" button in the Speech Logger menu, all *.vm files created on the sd-card are shown, and after clicking on them, nothing happens.
- camera- contains several submenus
- A.F.E.M.- choice of test for the camera (AF - auto focus)
- Raw Capture- starts Raw capture test
- start preview- shows the image from the camera on the screen
- WiFi- contains several submenus:
- Tx- Wifi Tx Registers tests
- Rx- Wifi Rx Registers tests
- EEPROM- this is the WiFi adapter firmware and the ability to disable / enable its functions via addresses (h, byte). Once again, I categorically do not advise you to try to change something, you can kill the WiFi adapter tightly and it will be very problematic to restore it, even if you make a "save as file" backup (for some reason, all values \u200b\u200bare saved as zero - 0000). I personally do not even suspect that we have an adapter installed.
- temperature sensor- WiFi adapter temperature test during operation
- MCR- it is possible to read/write Value(h) values at Addr(h) address
- Bluetooth- contains submenu:
- TX Only test- specify the values, click, then Done, passes the Bluetooth Tx Registers test
- test mode- includes test mode
- NetworkInfo- information about RR (what I don’t know) select a tick about what we want to see information about, then press the button on the phone, select Check Information, look.
- AutoAnswer- contains only the "enable-enable/disable-disable" button. This is an auto-pick up of the handset for an incoming call (checked).
- YGPS- tests and information about yGPS
- AGPS- the only menu in Russian, AGPS settings
Audio section menu:
- Set Mode- profile selection
- normal mode– standard (general, normal) profile
- Headset mode- headset mode
- Loud Speaker Mode- loudspeaker mode
- Speech enhancement- speech signal correction mode
Before choosing the maximum possible values, make sure that this does not create any problems with the sound. It is usually not recommended to set it to 0, as this can cause the effect of rattling and other noise + gives unnecessary additional load on the speakers.
Before changing values, always write down what the defaults were, so that in case of which you can return them.
We use Normal mode:
- You will see a menu with four positions, where the first item is the profile number.
- We leave FIR - 0 and do not touch it. Let's go down to the following settings.
- First, we set up the general volume modulation Tone, for this, in the Type menu section, select the Tone item (if it is not selected by default), then in the Value section below, set the volume value and click Set.
- Set to 1, but you can try different options from 0 to 100 - the higher the value, the quieter the sound, 0 is the maximum volume, however, it is not recommended to set 0, as the speakers will produce unpleasant side effects in the form of rattling and other bad things.
- Next, in the Type Side tone menu, and in no case do not touch it, otherwise you will hear yourself and not the interlocutor during the conversation. Or change the method of scientific poke at your own peril and risk
- Set Audio to 1
- Set Speech to 1
- In FM we put 1
- Set the Microphone to 12
- In Key tone it is by default 70 - did not change.
If it seems to you that the radio or music is playing quietly in the headphones, you can also edit the profile for the headset. Reboot your phone.