Using the engineering menu, the user can carry out advanced configuration of the device. This feature is little known, so you should analyze all the ways to gain access to it.
The ability to open the engineering menu is not available on all devices. On some of them, it is absent altogether or replaced by developer mode. There are several ways to access the features you want.
Method 1: Entering the code
First of all, you should consider the devices on which this function is present. To access it, you must enter a special code (depending on the manufacturer).
Attention! This method is not suitable for most tablets due to the lack of a dialing function.To use the function, open the application for entering the number and find the code for your device from the list:
- Samsung - * # * # 4636 # * # *, * # * # 8255 # * # *, * # * # 197328640 # * # *
- HTC - * # * # 3424 # * # *, * # * # 4636 # * # *, * # * # 8255 # * # *
- Sony - * # * # 7378423 # * # *, * # * # 3646633 # * # *, * # * # 3649547 # * # *
- Huawei - * # * # 2846579 # * # *, * # * # 2846579159 # * # *
- MTK - * # * # 54298 # * # *, * # * # 3646633 # * # *
- Fly, Alcatel, Texet - * # * # 3646633 # * # *
- Philips - * # * # 3338613 # * # *, * # * # 13411 # * # *
- ZTE, Motorola - * # * # 4636 # * # *
- Prestigio - * # * # 3646633 # * # *
- LG - 3845 # * 855 #
- Devices with a MediaTek processor - * # * # 54298 # * # *, * # * # 3646633 # * # *
- Acer - * # * # 2237332846633 # * # *
This list does not include all devices available on the market. If your smartphone is not in it, consider the following methods.
Method 2: Specialized programs
This option is most relevant for tablets, since it does not require entering a code. It can also be used for smartphones if entering the code did not give any result.
To use this method, the user will need to open " Play Market"And in the search window enter the query" Engineering menu". Based on the results, select one of the applications provided.
An overview of several of them is presented below:
The application is designed to launch the engineering menu on devices with a MediaTek (MTK) processor. Available features include managing advanced processor settings and the Android system itself. You can use the program if it is not possible to enter the code every time you open this menu. In other situations, it is better to opt for special code, since the program can put unnecessary load on the device and slow it down.
The program is suitable for most Android devices. However, instead of the standard engineering menu, the user will have access to advanced settings and codes for already installed applications. This can be a good alternative to engineering mode, since the chance of harming the device is much lower. Also, the program can be installed on devices for which the standard codes for opening the engineering menu are not suitable.
When working with any of these applications, you should be as careful as possible, since careless actions can harm the device and turn it into a "brick". Before installing a program not listed, please read the comments to it to avoid possible problems.
Method 3: Developer Mode
On a large number of devices, instead of the engineering menu, you can use the developer mode. The latter also has a set of advanced features, but these differ from those offered in engineering mode. This is due to the fact that when working with the engineering mode, there is a high risk of problems with the device, especially among inexperienced users. In developer mode, this risk is minimized.
To activate this mode, do the following:
1. Open the device settings via the top menu or the application icon.
2. Scroll down the menu to find the section " About phone"And run it.
3. You will be presented with the basic data of the device. Scroll down to “ Build number».
4. Click on it several times (5-7 taps, depending on the device) until a notification appears with the words that you have become a developer.
5. Then return to the settings menu. A new item will appear in it " For developers", Which you want to open.
6. Make sure it is on (there is a corresponding switch at the top). After that, you can start working with the available functions.
The developer menu includes a large number of available features, including backups and USB debugging. Many of them can be useful, however, before using one of them, make sure it is necessary.
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.
Moreover, 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 most likely want to fix in one way or another. Some are trying to finalize the software part of the mobile assistant to a perfect 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.
Android engineering menu: setting 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 Android engineering menu. The engineering menu refers to 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. Reckless use of this element can lead to unpredictable consequences. Most often, access to the engineering menu is hidden from users. However, his secret is already known to many. To understand how you can call the engineering menu, you just need to spend a few minutes looking for recommendations.
Important points
Exit to the "Android" engineering menu 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. First of all, the central processing unit of the device must be produced by MediaTek. On many low-cost Spreadtrum models, the popular Snapdragon from Qualcomm and various Tegras from Nvidia and Intel, it is useless to try to launch the engineering menu, since it is missing. You will not be able to work even if the corresponding application is provided.
In addition, various modified operating systems, such as the popular CyanogenMod, prevent the configuration program from running. This is due to the fact that these systems were originally developed for devices with a Qualcomm processor that 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 the standard explorer. So, for example, some manufacturers of mobile gadgets, after making the necessary settings of 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 settings of the engineering menu in the Android operating system, you can use several methods. Which one is better to say, 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 a special program - a dialer, the user had to dial the engineering menu code. The operation was carried out in the same way as checking the balance on the account. If the device has recognized and accepted the combination, the setup application starts. Some mobile device manufacturers use their own modified code. Therefore, the standard set will not 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 familiar way
Using a secret combination of characters may not be convenient in all cases. The user may simply forget the correct order of the numbers. In the case of a changed set, it will be easier to use the program instead of finding the correct order of characters. One of the best known applications 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, the current version was 2.9.9 or build 3.1.4, which has additional support for new processors.
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. This article will not talk about the peculiarities 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, you need to 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 decides to prudently remove the configuration software in order to ensure the security of the operating system, you can 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 just have to install it. Due to the abundance of analog clones, we will not indicate the exact name. You can simply copy the specified file to the system folder (system \\ app). After completing 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 should be noted that to perform this operation, the user will need root rights.
Miracle program and its capabilities
Setting up Android through the engineering menu opens up the opportunity for the user to solve several important tasks at once. In particular, here you can adjust the microphone sensitivity and speaker volume, reduce power consumption, limit scanning of unnecessary ranges and reduce the search time for satellites. Let's take a closer look at the above functions.
How do I increase the volume?
The volume of the call can be increased quite simply using the engineering menu. 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 parameter value in the first window. In the second window, you can set a higher parameter value. 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 scan for unnecessary frequency bands. The standard frequencies for 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 don't need, you need to use the Band Mode item of the engineering menu. Here you need to go to the settings for both SIM cards one by one and put a checkmark in front of the desired items. Pressing the Set button confirms.
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 EPO. Here you need to make sure that the Download and Enabled items are checked. Then you need to return to the YGPA item, select the information section and click in turn "Full" - "Cold" - "Restart". Then you need to select the item Satelites or "Satellites". Until the answer is recorded on the map. This entire procedure will take 2 to 5 minutes. You just need to exit the engineering menu, close the program and reboot the device.
The engineering menu on Android devices is a special "built-in" application into the operating system that allows you to fine-tune the device. This is necessary to debug the hardware and, of course, software. But often users want to change any settings as they see fit. In this case, the question arises of how to enter the Android engineering menu. This can be done by special service codes or third-party software.
What are the possibilities of the engineering menu
Settings and menu design on Android devices may vary depending on the manufacturer of the phone. In general, users use the engineering menu for the following reasons:
- Setting up audio on the phone (call volume, interlocutor's voice during a call);
- Changing camera settings;
- Using recovery mode;
- Setting the microphone sensitivity;
- Disabling unused frequencies to save phone battery;
- Getting information about the MAC address of the device;
- Setting up Bluetooth and Wi-Fi.
Engineering menu Android provides the user with almost limitless possibilities. But you should always remember that only advanced users can use it. Changing some of the settings may cause your smartphone or tablet to function incorrectly. If you don't know what each menu item is directly responsible for, simply leave it alone.
The developer mode includes setting up the Hardware Testing hardware, and also contains the following items:
- Audio - volume control in the phone speakers.
- Camera - allows you to configure various camera parameters (image size, type, etc.).
- Diving current camera shows the camera current.
- CPU Stress Test performs a test load on the central processor.
- De-sense is a device manager that manages configuration options.
- 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 the memory card.
- TouchScreen - touch screen setting, sensitivity test.
- USB - testing 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 custom MTK log. In the Others tab, you can change fonts, as well as see the temperature of the processor and battery.
How to enter the engineering 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 gives 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:
- HTC models - * # * # 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 see in the specification of your device what processor you have installed. If this is a product of MediaTek (MTK), 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 for Android do not work in the operating version 4.2.1 and 4.2.2.
What third-party applications can be used to enter the engineering menu
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 enter 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 MTK".
To use it, you need:
- Go to the "Play Market", while in the search bar enter the name of the program.
- Download and install it.
- Run on your phone.
After that, you will see a couple of tabs with different 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 appropriate sections and configure the parameters. In this case, the phone will be on all the time.
An alternative option 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 of the developer's menu items will be available in it.
The engineering menu on Android devices is a special “built-in” application into the operating system that allows you to fine-tune the device. This is necessary to debug the hardware and, of course, software. But often users want to change any settings as they see fit. In this case, the question arises of how to enter the Android engineering menu. This can be done by special service codes or third-party software.
Developer menu: what are the features
Settings and menu design on Android devices may vary depending on the manufacturer of the phone. In general, users use the engineering menu for the following reasons:
- Setting up audio on the phone (call volume, interlocutor's voice during a call);
- Changing camera settings;
- Using recovery mode;
- Setting the microphone sensitivity;
- Disabling unused frequencies to save phone battery;
- Getting information about the MAC address of the device;
- Setting up Bluetooth and Wi-Fi.
Engineering menu Android provides the user with almost limitless possibilities. But you should always remember that only advanced users can use it. Changing some of the settings may cause your smartphone or tablet to function incorrectly. If you don't know what each menu item is directly responsible for, simply leave it alone.
The developer mode includes setting up the Hardware Testing hardware, and also contains the following items:
- Audio - volume control in the phone speakers.
- Camera - allows you to configure various camera parameters (image size, type, etc.).
- Diving current camera shows the camera current.
- CPU Stress Test performs a test load on the central processor.
- De-sense is a device manager that manages configuration options.
- 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 the memory card.
- TouchScreen - touch screen setting, sensitivity test.
- USB - testing 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 custom MTK log. In the Others tab, you can change fonts, as well as see 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 gives 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:
- HTC models - * # * # 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 see in the specification of your device what processor you have installed. If this is a product of MediaTek (MTK), 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 for Android do not work in the 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 enter 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 MTK".
To use it, you need:
- Go to the "Play Market", while in the search bar enter the name of the program.
- Download and install it.
- Run on your phone.
After that, you will see a couple of tabs with different 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 appropriate sections and configure the parameters. In this case, the phone will be on all the time.
An alternative option 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 of the developer's menu items 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 components of your smartphone.
Android smartphones and tablets 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 very rare cases and are not used regularly. Today we will talk about the engineering menu.
What is it and why is it needed?
We are talking about a special program that developers use at the final stage of configuring the software platform of a mobile device. With its help, they make the latest changes to the operation of the device, check the functioning of various sensors and test 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 solely responsible for the consequences.
The engineering menu is available on smartphones and tablets powered by the MediaTek processor... On the Qualcomm chipset, it is either cut or not at all.
How do I 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 did not work or you do not have a dialing application (relevant for tablets that do not support calls), the MobileUncle Tools or MTK Engineering applications, which can be downloaded for free from Google Play, will help.
Often in Chinese (and certainly not only Chinese) Android-based phones in the engineering menu, far from optimal volume settings for the speaker, headset (headphones) and microphone are set, their correction will be discussed in this article.
How to get into the engineering menu of an Android phone
To get into the engineering menu, open the dialing 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 MTK processor
*#*#8255#*#* or *#*#4636#*#* –Samsung smartphones
*#*#3424#*#* or *#*#4636#*#* or *#*#8255#*#* - HTC smartphones
*#*#7378423#*#* - Sony smartphones
*#*#3646633#*#* - smartphones TEXET, Fly, Alcatel,
*#*#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 should open. But on some devices, you still need to press the "Call" key
A list of sections of the engineering menu of the phone will appear.
Just in case, grab a notepad and pen and take notes on the settings that were set on your phone before you intervened. You never know, anything can happen.
On my phone (based on MTK processor), 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 there you will also find free applications 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 level setting of the device:
We go into the program or type a magic combination to enter the engineering menu. Further, 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 (skip it), and the engineering menu of the phone itself.
We need the engineering menu of the phone, so select the "Engineer Mode (MTK)" section. This item is circled in the figure with a red marker.
A very long menu will open, through which you can get to almost any phone settings. But it is not enough to get to them, you need to know how to manage them.
Therefore, do not change what you have no idea about.
At worst, write down the parameters that were before your intervention in order to return them back later. Let's continue!
Since we are interested in setting the sound level, select the item "Audio", I circled it with a red marker.
And ... magic! The menu that interests us for setting the parameters of the speakers and microphone opens.
And actually why did we get into this menu? Does something work like this out of curiosity? Okay, let's continue to figure it out!
It is worthwhile to linger here and figure out 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;
LoudSpeaker Mode (loudspeaker mode) - it is activated when nothing is connected to the phone or tablet, and you turn on the loudspeaker during a call;
Headset_LoudSpeaker Mode (loudspeaker mode with a connected headset) - this mode is activated if headphones or external speakers are connected to the phone or tablet, and you turn on the loudspeaker during a call;
Speech Enhancement (phone call mode) - this mode is activated in the normal phone call mode, and nothing is connected to it (headset, external speakers) and speakerphone is not turned on.
Debug Info - it is not clear why - information on backing up information or debugging it;
Speech Logger - I did not fully understand, 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 the week_month_year__hour_minutes_seconds (for example, Friday_July_2016__time17_12_53.pcm).
What these files are for and how they can be useful to us is not clear. The / sdcard / VOIP_DebugInfo directory (which is the storage location for files with backup information) is not automatically created, if you create it manually, then after a conversation it will remain empty.
Audio logger - serves to record sound, which supports quick search, playback and saving.
When entering any of the modes, you will have access to various volume settings (Type). Here is a list of the basic settings you need to know:
- Sip - settings for internet calls;
- Mic - microphone sensitivity settings;
- Sph - spoken dynamics settings (the one that we apply at the ears);
- Sph2 - settings for the second spoken speaker (I don't have one in 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 - adjust the volume of the incoming call;
- FMR - FM radio volume settings.
A list of volume levels (Level) is available under the item for selecting settings (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.
Thus, 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 located in the cell Value is 0 ~ 255. They should not exceed 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) for assignment.
Finally, below 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. The name of the items may differ on different models. This is the MTK platform, so be prepared to strain your brain and search for a match in your menu. I have a Jiayu G3 phone.
My changes were applied immediately, but maybe someone will 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..
YOU MAKE ALL CHANGES AT YOUR OWN RISK !!! Do not forget to include the thought!
P.S.: I found the font size setting on my phone. It turns out that you can still increase it!
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 for testing 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 an application from PlayMarket, anyone can enter the engineering menu.
Why do you need a hidden engineering menu in Android
Engineering Mode is essentially a hidden application that developers use to test and set optimal parameters for a mobile phone or tablet. Experts check the operation of the sensors and, if necessary, make adjustments to the functioning of the system components.
When working with the Android technical menu, be careful - changing some 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 for Starting 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 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 engineering menu MTK", 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 also Android 5.1 Lollipop. Also the menu is invalid when the Cyanogen Mod firmware is installed. In Android 4.4.2, when you reboot, the changes made in the application are reset.
"Launching the engineering menu of MTK"
The application allows you to open and configure the engineering menu without typing digital commands. Works correctly on MediaTek processors (МТ6577, МТ6589, etc.) and Android 2.x, 3.x, 4.x, 5.x systems. According to user reviews, the program successfully performs its functions, but after restarting the smartphone, the settings made using the application are reset.
Mobileuncle Tools program
The functionality of the application is similar to the previous one, but, in addition to accessing the engineering menu, the user can view information about the screen, sensor and device memory, as well as update the firmware, restore the IMEI number and improve the GPS. Root rights are required for stable operation.
To enter the engineering menu, select Engineer Mode
Shortcut Master Utility
Shortcut Master is designed to work with shortcuts and system applications: create, search, delete. There is no direct function for entering the engineering menu. But with its help you can view a list of secret commands operating 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 does not require unnecessary actions.
In the program, open the additional menu and select the Secret code explorer item to see the list of codes
Root rights to access the engineering menu
To get to the service menu on some versions of Android, the user must have superuser (root) rights. You can get the rights using specialized applications: Farmaroot, UniversalAndRoot, Romaster SU and others. To get Root access to a device using Farmaroot:
- Install and run the program. Google Play link: https://play.google.com/store/apps/details?id\u003dcom.farmaapps.filemanager&hl\u003dru.
- If the application supports the installation of root-rights on your device, then on the screen you will see a list of possible actions, among them - "Get root". Select this item.
- Choose one of the predefined 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 it using a different method (select 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 differ depending on the tablet or smartphone model. In the menu, users most often adjust sound, change camera settings, and use recovery mode. The parameters for adjustment and the procedure for action are shown below. Be careful - the names of the menu items may differ in different device models! You act at your own risk.
Audio: boost volume
If your phone is not ringing 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 \u200b\u200b- set the numbers in ascending order, from 120 to 200. Increase the value in the Max. Vol is maximum 200. Press the SET button to save the settings.
Change the maximum volume values \u200b\u200bfor each level sequentially
Audio: increase the volume of a telephone conversation
To enhance the tone of the speaker for conversations, in the Audio section of the service menu, select Normal mode and open the Sph item. Set the values \u200b\u200bfor 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 better hear the other person 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, reset and check if the other person can hear you better.
Increased microphone sensitivity will allow the other person to hear you better
Video: adjusting sound parameters in the engineering menu
Battery: cut off unused frequencies
Smartphones quickly drain battery power for applications, cellular 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. A pair of 900/1800 MHz operates in Russia, 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 Band Mode. Disable unused frequencies by unchecking the corresponding items - PCS1900 and GSM850. If the device supports two SIM cards, open the items SIM1 and SIM2 in turn and follow the steps indicated 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, disconnect 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. In the meantime, photographers prefer to shoot and process their footage in RAW for more editing options. The technical menu allows you to select the desired picture 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 images, set the ISO value, enable shooting in HDR for higher details of the photo, set the frame rate for video. After changing each parameter, remember to press SET to save the settings.
Recovery mode
Recovery Mode - analogue of Bios on a computer, allows you to control the device without logging into Android. 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 unless you are sure of what it will lead to. Some commands can damage 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 the SET button at the bottom of the screen. If the parameters are reset after restarting the device, try to enter 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 devices on Android
In addition to the technical menu, secret USSD codes allow you to control the functionality of smartphones on Android - 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 | Value |
| Codes for most manufacturers | *#*#7780#*#* | Rollback settings and uninstall custom applications |
| *2767*3855# | Firmware change, total rollback of settings. | |
| *#*#232339#*#* *#*#526#*#* |
Checking wireless connections | |
| *#*#34971539#*#* | Details of the camera | |
| *#*#232338#*#* | Viewing Wi-fi address | |
| *#*#273283*255*663282*#*#* | Activating a media backup on your phone | |
| *#*#1472365#*#* | GPS Rapid Test | |
| *#*#0*#*#* | Screen check | |
| *#*#2663#*#* | Viewing touchscreen information | |
| *#*#2664#*#* | Touchscreen testing | |
| *#*#4636#*#* | General device and battery data | |
| *#*#0673#*#* *#*#0289#*#* |
Audio tests | |
| *#*#7262626#*#* | Checking GSM reception | |
| *#*#0842#*#* | Vibration and display brightness test | |
| *#*#3264#*#* | RAM information | |
| *#*#232331#*#* | Bluetooth communication test | |
| *#*#8255#*#* | Google Talk check | |
| *#*#232337#*#* | Bluetooth address information | |
| *#*#1234#*#* | Device firmware data | |
| *#*#44336#*#* | Device build date | |
| *#06# | IMEI number information | |
| *#*#197328640#*#* | Service activity test | |
| *#*#1111#*#* | Free-to-air software version | |
| *#*#2222#*#* | Iron number for free-to-air | |
| *#*#0588#*#* | Proximity sensor test | |
| Sony (unified commands operate on devices) | **05***# | Unblocking PUK-code |
| Motorola | *#06# | IMEI |
| *#*#786#*#* | Rollback settings to the original | |
| *#*#1234#*#* *#*#7873778#*#* | Opening Rooted Applications | |
| *#*#2432546#*#* | Checking 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 (generic codes are 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 didn't work, don't be discouraged - install and run the Secret Codes app (Google Play link: https://play.google.com/store/apps/details?id\u003dfr.simon.marquis. secretcodes & hl \u003d ru). The program will analyze the combinations operating 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 your 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 breakdown.
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.)
- TouchScreen - contains several submenus
- HandWriting - a simple drawing with your finger 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 - the same as PointVerification, only draws lines from one point to another
- V erification - ShakingVerification - "shaking" test
- GPRS - tests of GPRS operation, PDP (Packet Data Protocol) check
- Audio - setting all volumes and everything related to sound, contains the following submenus:
- Set Mode - choice of phone mode (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 the mode in headphones
- LoudSpeaker Mode - setting the loudspeaker mode (the same Handfree mode?)
- Speech Enchancement - adjustment / correction of speech signals
- Debug Info - information on debugging, values \u200b\u200bare set via Parametr 0-15 and what they are responsible for is unknown.
- Speech Logger - conversation recording. When you enable "enable" after a conversation, it creates a file with a name like this in the root of the sd card: Sun_Feb_2012__01_15_31.vm (Sunday_February_2012__time01_15_31.vm), what kind of files are these and how to open them - I do not know. The / sdcard / speechlog folder (which is specified as File location) - does not automatically create it, if you create such a folder manually, after a 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
- AF EM - choice of test for the camera (AF - auto focus)
- Raw Capture - launches 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 firmware of the WiFi adapter and the ability to disable / enable its functions via addresses (h, byte). Once again, I strongly advise against trying to change anything, you can kill the WiFi adapter and restore it will be very problematic, even if you make a "save as file" backup (for some reason, all values \u200b\u200bare saved as zeros - 0000). I personally do not even suspect what kind of adapter we have installed.
- Temperature Sensor - test the temperature of the WiFi adapter during operation
- MCR - it is possible to read / write to the Addr (h) address of the Value (h) values
- Bluetooth - contains a submenu:
- TX Only test - we specify the values, click, then Done, the Bluetooth Tx Registers test passes
- Test Mode - turns on test mode
- NetworkInfo - information about RR (which I don’t know) select with a tick 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-pickup 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
- LoudSpeaker Mode - loudspeaker mode
- Speech Enhancement - speech signal correction mode
Before choosing the maximum possible values, make sure that this does not create any sound problems. It is usually not recommended to set it to 0, as it can cause the effect of rattling and other interference + gives an extra additional load on the speakers.
Before changing the values, always write down what were the defaults so that in case of what 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 leave it alone. Go to the next parameters below.
- First, we set up the general modulation of the Tone volume, for this, in the Type menu section, select the Tone item (if it is not selected by default), then below in the Value section we set the volume value and press Set.
- We set it to 1, but you can try various 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 it to 0, as the speakers will produce unpleasant side effects in the form of rattling and other bad things.
- Further in the menu Type Side tone and in no case do not touch it, otherwise during a conversation you will hear yourself and not the interlocutor. Or change by scientific method at your own peril and risk
- In the Audio item, set 1
- In Speech, set 1
- In FM set 1
- In Mikrophone we put 12
- The default Key tone is 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.
Often in Chinese (and certainly not only Chinese) Android-based phones in the engineering menu, far from optimal volume settings for the speaker, headset (headphones) and microphone are set, their correction will be discussed in this article.
How to get into the engineering menu of an Android phone
To get into the engineering menu, open the dialing 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 MTK processor
*#*#8255#*#* or *#*#4636#*#* –Samsung smartphones
*#*#3424#*#* or *#*#4636#*#* or *#*#8255#*#* - HTC smartphones
*#*#7378423#*#* - Sony smartphones
*#*#3646633#*#* - smartphones TEXET, Fly, Alcatel,
*#*#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 should open. But on some devices, you still need to press the "Call" key
A list of sections of the engineering menu of the phone will appear.
Just in case, grab a notepad and pen and take notes on the settings that were set on your phone before you intervened. You never know, anything can happen.
On my phone (based on MTK processor), 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 there you will also find free applications 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 level setting of the device:
We go into the program or type a magic combination to enter the engineering menu. Further, 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 (skip it), and the engineering menu of the phone itself.
We need the engineering menu of the phone, so select the "Engineer Mode (MTK)" section. This item is circled in the figure with a red marker.
A very long menu will open, through which you can get to almost any phone settings. But it is not enough to get to them, you need to know how to manage them.
Therefore, do not change what you have no idea about.
At worst, write down the parameters that were before your intervention in order to return them back later. Let's continue!
Since we are interested in setting the sound level, select the item "Audio", I circled it with a red marker.
And ... magic! The menu that interests us for setting the parameters of the speakers and microphone opens.
And actually why did we get into this menu? Does something work like this out of curiosity? Okay, let's continue to figure it out!
It is worthwhile to linger here and figure out 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;
LoudSpeaker Mode (loudspeaker mode) - it is activated when nothing is connected to the phone or tablet, and you turn on the loudspeaker during a call;
Headset_LoudSpeaker Mode (loudspeaker mode with a connected headset) - this mode is activated if headphones or external speakers are connected to the phone or tablet, and you turn on the loudspeaker during a call;
Speech Enhancement (phone call mode) - this mode is activated in the normal phone call mode, and nothing is connected to it (headset, external speakers) and speakerphone is not turned on.
Debug Info - it is not clear why - information on backing up information or debugging it;
Speech Logger - I did not fully understand, 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 the week_month_year__hour_minutes_seconds (for example, Friday_July_2016__time17_12_53.pcm).
What these files are for and how they can be useful to us is not clear. The / sdcard / VOIP_DebugInfo directory (which is the storage location for files with backup information) is not automatically created, if you create it manually, then after a conversation it will remain empty.
Audio logger - serves to record sound, which supports quick search, playback and saving. 
When entering any of the modes, you will have access to various volume settings (Type). Here is a list of the basic settings you need to know:
- Sip - settings for internet calls;
- Mic - microphone sensitivity settings;
- Sph - spoken dynamics settings (the one that we apply at the ears);
- Sph2 - settings for the second spoken speaker (I don't have one in 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 - adjust the volume of the incoming call;
- FMR - FM radio volume settings.
A list of volume levels (Level) is available under the item for selecting settings (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.
Thus, 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 located in the cell Value is 0 ~ 255. They should not exceed 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) for assignment. 
Finally, below 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. The name of the items may differ on different models. This is the MTK platform, so be prepared to strain your brain and search for a match in your menu. I have a Jiayu G3 phone.
My changes were applied immediately, but maybe someone will 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..
YOU MAKE ALL CHANGES AT YOUR OWN RISK !!! Do not forget to include the thought!
P.S.: I found the font size setting on my phone. It turns out that you can still increase it!
P.P.S .: if something is still not clear, then here is a video on setting up sound in the engineering menu:
