Enter the android engineering menu. Android engineering menu: detailed instructions for setting up your phone

Let's look at the features of the Android engineering menu from various manufacturers, why it is needed, how to use it and what useful features This menu is for you.

This article is suitable for all brands that produce phones on Android 9/8/7/6: Samsung, HTC, Lenovo, LG, Sony, ZTE, Huawei, Meizu, Fly, Alcatel, Xiaomi, Nokia and others. We are not responsible for your actions.

What is the Android engineering menu?

Engineering menu (Engineering Mode) is a special application that is available on almost any gadget. Used by the manufacturer for different tests and optimizing the operation of sensors, functions and other parameters of the tablet or phone. This menu is hidden in the system by default so that the user cannot access it.

As a rule, engineering menu called using a small code that is entered on a standard dialer. It can be accessed by using third party programs.

The engineering menu is hidden due to the fact that careless use of its capabilities can lead to damage to the device. Please be careful when making any changes.

How to enter the engineering menu on Android

A secret application cannot be launched through the regular interface. You can enter the engineering menu this way:

Open the calls window to enter a phone number using the keyboard.
We write special combination characters.
If immediately after entering the code this menu does not start, press the call button.

Each manufacturer has its own combination of symbols, which contains special characters(*, #) and numbers. For example, for Samsung phones the engineering menu is launched with the following sequence: *#*#4636#*#*. The screenshot below shows the codes for different manufacturers gadgets.

If nothing happens after entering the code, use applications from Google Play that work with the engineering menu. For example, the MTK Engineering Mode application, which is a complete copy of the standard engineering menu. Most of them will require root rights to the device, without which the software will function with errors, and some parameters will be inaccessible.

Mobileuncle Tools

The program has advanced features. You can view and change basic settings, update firmware, repair IMEI and improve GPS signal. The utility displays the full characteristics of the memory, screen, and sensor.

MTK engineering menu

Program for gadgets with MediaTek processors. Loads successfully engineering functions, but there are errors with saving parameters. They may reset after a reboot.

Recovery Mode

This mode for developers is useful when serious problems arise with the gadget. If your tablet or smartphone does not turn on, and you cannot get into the regular menu, you will be able to launch recovery mode.

To start, use the following combination: the power key and the volume down or up button. In some cases it is necessary to additionally press Home. Press and hold the indicated buttons until the download begins.

In this mode, the most useful section is wipe data. With its help it starts full reset, and the device returns to factory settings. You will receive clean phone, and all data and applications will be lost. Resetting helps in a situation where you have gone too far with the changes in the engineering menu, setting invalid values.

Shortcut Master utility

The software allows you to work with shortcuts and system programs(creation, search, deletion). There is no function for direct entry into the engineering menu, but you can see a list with secret commands that operate on your gadget.

By clicking on the command name, the user is shown a drop-down menu with the “Run” option. The utility is convenient, no extra steps are required.

To see the list of codes, you need to call in the utility additional menu. Then select the line “Secret code explorer”.

Root rights to enter the engineering menu

To enter the engineering menu in some versions of Android, the user needs to have . They can be obtained using specialized software: Romaster SU, UniversalAndRoot, Farmaroot, etc.

Instructions for obtaining root rights using Farmaroot:

Install and launch the software.
If the utility supports installing root rights on your gadget, then the “Get root” option will be displayed on the screen. Select this item.
From the preset methods for obtaining root, select one.
The software will begin installation.
After completing the procedure, a message will be displayed indicating the successful installation of root access.

Possible errors and solutions:

Root rights are not installed - try another method (select a new exploit in the application).
The application closed mid-installation. The user needs to restart the device and try again.

Engineering menu functions

The engineering menu is divided into several categories. Let's look at each of them separately:

Telephony. This category contains settings that relate to mobile communications. For example, you can disable or activate certain BandModes (different frequencies for 2G/3G/4G operation), disable in background data transfer or check the operation of SIM cards.
Connectivity. Wi-Fi setup, Wi-Fi CTIA, radio, Bluetooth settings. In the settings you can specify the type of antenna (you must use headphones), radio wave, sound format (stereo or mono). The radio will play directly from this section.
Hardware Testing. Here you can configure the work different components device: sound levels of speakers and headphones, microphone sensitivity, different camera parameters (focus, HDR, ISO adjustment, photo aspect ratio and much more), sensor operation (calibration), touchscreen, etc. This category is quite global and large; you need to understand all sections and have skills and serious knowledge.
Location. In this category it is customizable GPS work, you can conduct testing and see the number of satellites found.
Log and Debugging. This category contains logs of the battery (charge percentage, temperature, operating time, voltage) and other functions that are little known to the average user.
Others. Contains two functions that are unknown to most users.

Engineering menu settings

The options for adjusting parameters and the appearance of the engineering menu may differ depending on the model of smartphone or tablet. Users most often use the menu to adjust the sound, change the camera settings and use the recovery mode.

Volume Boost

If your gadget does not ring loudly enough, then in the engineering menu you need to find the Audio item and go to LoudSpeaker Mode. There we select the Ring tab. For all signal levels (1 – 6 Level) we change the values. The numbers are arranged in ascending order.

In the Max. Vol. increase the value to the maximum. To save the settings, press the SET button.

Increasing the volume of a telephone conversation

To increase the speaker tone during calls, select Normal mode in the Audio service menu, then open the Sph section. For signal levels (1 – 6 Level) we set values from 100 to 150, and Max. Vol. – 160.

In the Audio menu you can increase the microphone sensitivity. To do this, select Normal mode, then Mic. For all levels we assign same value microphone sensitivity. Press the SET button, then reboot and check whether the interlocutor can hear you better.

The engineering menu provides access to manual setting the “hardware” part of the smartphone. To enter you need to enter a special code or install an application, but there are a number of features that are worth paying close attention to. If you were unable to enter the engineering menu the first time, then you did not take into account the features of the device. It is worth immediately clarifying that any interference with the operation of the device may lead to its inoperability and loss of warranty.

Hidden capabilities of the system

At the last stages of setting up a smartphone, developers test the system for errors and check the operation of all sensors on the device. Especially for this purpose, Android has a special subroutine built into it - an engineering menu that provides access to hidden settings Android OS allows you to reconfigure them yourself. In addition, the menu contains detailed information about the device. Full list The menu's capabilities are known only to platform developers, so changes should be made with caution.

Secret paths of developers

To enter the engineering menu, dial the code *#*#3646633#*#*. On some models, you additionally need to press the call key. It is worth considering the features of phones: for different brands there are different combinations of numbers. The Android version does not affect the functionality of the engineering menu.

Enter a special code to enter the engineering menu

If no problems arise, you will be taken to an additional menu for fine-tuning your smartphone.

Enter the menu subsection

Depending on the system version and processor model, the engineering menu may be incomplete or missing. In the photo above there is a subsection of the menu with elements for testing smartphone sensors, setting up a USB connection, and performing internal and external memory tests.

If it doesn't work out the first time

Not all devices can access the engineering menu. Let's look at a number of common problems and ways to fix them.

Android is a complex Unix-based operating system. If you can’t do something, you haven’t taken into account all the nuances of the functioning of a particular subroutine.

List of special codes

One of the common reasons for blocking entry to the engineering menu is an incorrect special code. The combination of numbers depends not only on the device model, but also on the type of processor. For example, most devices based on the MTK chip are equipped with an engineering menu. If we talk about Qualcomm, not all smartphones based on this platform have an engineering menu built into them. The list of combinations is given in the table. If you don't find the one you need, try entering a different combination.

Table: code options for different Android models

DIY engineering menu

If none of the special codes work, don’t worry. There are many applications on the network with engineering menu functionality. It is worth noting that the MTK prefix in the names eloquently indicates compatibility only with MediaTek processors.

First option - Mobileuncle MTK Tools. In addition to the necessary set of settings, this program has several additional functions: firmware update, recovery update, GPS receiver enhancement mode and much more.

Mobileuncle MTK Tools provides a set of settings

Another program is MTK Engineering Mode. The program completely replicates the standard engineering menu.

MTK Engineering Mode repeats the standard engineering menu

For those whose device is not equipped with an engineering menu, there is another option: installing third-party firmware. Assemblies from third-party developers often contain a wide range of customizable settings.

Where to start

When you first enter the menu, you can get lost in the jungle of parameters.

Engineering menu settings

Settings open up enormous possibilities for users.

Depending on the hardware platform, some items may not be available or may be missing.

In this section you can configure mobile communication settings.

Auto Answer. You can enable or disable automatic answering of an incoming call.
Band Mode. Allows for manual mode select the frequency range for the GSM module to operate. You will see all technologies and frequencies for them supported by your smartphone model. If you wish, you can uncheck bands that are not used by your carrier. This will significantly save battery power. To save the settings, press the set button.
CFU Setting (Call forwarding Settings). The option enables or disables conditional forwarding. It must be supported by the operator.
AT Command Tool. A utility for developers that supports AT commands. This menu item will be of interest to programmers and developers. Using this menu, you can perform various queries directly to the system without visual add-ons.
Modem Test. Configuring compatibility of the “access point” option with various types connected devices.
Network Selecting. Here you can select mobile communication standards (GSM, WCDMA, LTE). For additional energy saving, turn off unused ones.
NetworkInfo. Select one or more options to display information about the status of parameters cellular communications. After selecting, open the additional menu (three dots on the right in top corner) and click Check Information. This option is convenient for checking the quality of cellular operator services.
GPRS. Setting up a connection to mobile internet, selecting an active SIM card (if there are several).
HSPA Info. Information about the 3G network if supported by your mobile operator.
Mobile data service preferred. The Internet will be given priority over voice traffic to increase data transfer speeds. Incoming calls may not go through.
Fast Dormancy. Allows you to save battery energy in third generation networks. The option must be supported by your telecom operator.
RAT Mode (Phone Info). Allows you to select the priority communication standard. You should change the parameter carefully, it blocks the settings of the Network Selecting item.
RF De-sense Test. You can select a frequency range and a specific channel to check the communication quality.
SIM ME Lock. This subsection allows you to configure the regional parameters of the GSM module (MNC, NCC) manually.

Photo gallery: mobile communication parameters

We get to the main window of the subsection Enable or disable auto-response Enable or disable conditional forwarding Configure the “Modem” mode Display information from the GSM module Configure the mobile Internet Select the priority of the connection type Configure the operation of the 3G mode Select the type of mobile communication Check the network power Configure regional communication parameters

Wireless interfaces

This section is intended for testing modules wireless transmission data (Wi-Fi, Bluetooth, FM).

Bluetooth. A wide range of settings and tests for the module of the same name in order to check the reception and transmission of data, and start the debugging mode.
CDS Information. Information about the parameters of wireless interfaces.
FM Receiver. Checking the FM module of the device.
Wi-Fi. Testing the module for transmitting and receiving information on the specified frequency channel.
Wi-Fi CTIA. Recording logs of wireless technology tests.

Photo gallery: wireless data transmission

Select the section for checking the device’s wireless modules Check the bluetooth operating mode Find information about the wireless interfaces Configure the FM module Check the operation of the WiFi module Write data about checking the WiFi module to a log file

Audio - fine-tuning audio playback parameters.
Camera - a set of parameters for taking photos and videos that are not included in the Camera application.
Driving Current Camera - takes current readings from the sensor in the camera circuit.
CPU Stress Test - performing tests of all subsystems central processor.
Deep Idle Setting - disable sleep mode in standby mode.
Sleep Mode Setting - sleep mode settings.
ChargeBattery - View battery information.
Sensor - sensor calibration.
Multi-Touch - quantity check available points to press the screen at the same time.
Location Engineer Mode - checking the parameters of the GPS module.

Photo gallery: equipment testing

Go to the verification section electronic components Adjusting the volume conversational speakers Set up the camera's power supply Set up the standby mode Set up the CPU frequency Set up the sleep mode Look at the battery information Set up touch screen Checking the capabilities of the multi-touch function Setting up the GPS module

Adjusting the speaker volume

In the subsection you can adjust the overall volume level, headphone and speakerphone volume.

You should be careful when changing volume settings. All parameters are individual for specific model devices. Incorrect configuration may lead to deterioration in hearing performance.

There are a number of general parameters:

MaxVol - general volume level. The range of values is from 0 to 160. Than larger number, the higher the volume.
Sph - volume during a telephone conversation.
Mic - microphone sensitivity.
Ring - speaker volume for an incoming call.
Media - volume level when watching movies, listening to music and playing games.

Very often, users are unhappy with the speaker volume during a conversation. To improve audibility, go to the Normal Mode menu and change the Sph parameter to 150. If the phone rings quietly when incoming call, then you need to increase the value of the Ring parameter. We advise you not to set the value above 200, as this may damage the speaker. To make you better heard, change the Mic parameter from 100 to 172. This will increase the sensitivity of the speaker.

ROOT is a panacea for a smartphone

On a smartphone without root rights functionality The engineering menu is limited: some items are not displayed, changes made are not saved. For any intervention in the operation of the smartphone, you need open access into the system. Do not forget that obtaining root access can damage your gadget and will void the device warranty. We strongly recommend that you back up important information to a memory card and synchronize it with your Google account and remove it to avoid data loss. To unlock full access you can use one of the existing methods to enter the system.

Installing the application directly on the device (KingRoot)

Superuser access can be opened from a smartphone using special programs. Let's look at the sequence of operations using the KingRoot program as an example:

After this, you can safely change the parameters in the engineering menu, all changes will be saved. If the result is negative, we move on to the next method.

Obtaining superuser rights via PC (Kingo Root)

This method is slightly different a large number preparatory activities:

The engineering menu is used to configure the device and test the operation of the hardware. This is a built-in subroutine of the system, which is an indispensable tool for both experienced users, and for newcomers to the world mobile devices. However, it should be noted that manipulations with the engineering menu can render the gadget inoperative.

We are all familiar with the rich settings of Android devices - each smartphone or tablet can be customized by activating or disabling certain functions, adjusting certain parameters. But few people suspect the existence of such a thing as the Android engineering menu. It is hidden from view, since there is nothing special for the average user to do here. But if you are an advanced user or want to gain experience in fine-tuning the device and operating system, then this menu will be useful to you.

Service menu options

Let's figure out why we need an engineering menu in a smartphone? The answer is simple - for very fine tuning of the device. For example, increasing the volume on Android is only possible through the engineering menu. Here you need to visit the audio settings item and play with the presented parameters. Here it is possible to manually adjust the sound volume in various modes and at various volume levels.

Let's look at an example:

You discover that on maximum volume the speaker of your smartphone starts to wheeze;
We go to the engineering menu using one or another command;
Go to the audio settings and change the volume in the specified mode and in the specified gradation;
We exit the engineering menu and check the results - the volume should decrease.

Only such fine adjustments are possible through standard menu settings? Naturally, there is nothing of the kind here.

Here you can adjust the sound in the headphones, adjust the sensitivity of the microphone, and perform other actions with the sound. Before getting into the settings, you need to find detailed instructions that will help you make the adjustments as correctly as possible, without the risk of damaging the speakers with a microphone or completely depriving your smartphone/tablet of your voice.

What other functions are there in the engineering menu? Checking network modules, adjusting the reception range, setting up auto-answer, testing the modem, setting up connections with other devices, setting up the receiver, testing the camera, sensor, screen, battery and other modules.

Geolocation settings are placed in a separate hidden menu– here you can check the functionality of the GPS chip, enable/disable A-GPS, and check other settings. It is also possible to adjust fonts, play with USB settings and perform other actions.

Please note that the service menu on Android is intended for professionals who are aware of their actions. If you came here out of idle curiosity, try not to touch parameters you don’t understand and don’t rearrange the settings sliders.

How to enter the engineering menu on Android

Entering the engineering menu on Android is most often done using special commands, similar to the most common USSD commands. The difference is that you don’t need to press the call button at the end - after typing the command, it will automatically transfer to the specified menu. Universal code engineering menu on Android is the code *#*#3646633#*#*. It works on many phones and allows you to instantly enter service settings.

Some smartphones and tablets do not respond to the above command. So you can try the following options:

*#*#4636#*#*;
*#15963#*;
*#8255#*;
*#*#7378423#*#* (for Sony smartphones);
*#*#3424#*#* (code for HTC smartphones);
*#*#2846579#*#* (code for Huawei smartphones).

You can enter the engineering menu on Android immediately after entering the command. There is no dependence on the operating system version - the codes are valid for Android 2.2, Android 4.4 and other versions of Android OS. If the code does not fit, you should look for other combinations.

Some commands lead not to the service menu, but to the testing menu - it allows you to check the screen, sound, wireless modules, microphone and much more. Menus for testing can be English or Russified.

Some manufacturers deprive smartphones and tablets of access to the engineering menu, replacing it with numerous commands for testing modules or configuring certain parameters. For example, this is what Samsung does - many new models do not have a single service menu. Information about available service teams can be found on specialized resources and on the websites of service centers.

To access the engineering menu you can use special applications . A typical example is the Mobileuncle MTK Tools application. It will allow you to gain separate access to device settings and operating system settings. The application is really convenient, but it has a drawback - it only works on devices with MTK processors.

If your smartphone/tablet runs on a different platform, you can try looking for alternative applications to access the engineering menu on Android.

Setting up Android through the engineering menu is associated with certain risks. For example, beginners always have the opportunity to accidentally disable this or that functionality. When understanding the purpose of certain items, you need to familiarize yourself with the appropriate instructions. Otherwise, equipment failure may occur. If you are afraid of damaging or breaking something, make a complete backup of your device - in case of a fatal error, you will be able to Hard Reset and restore your smartphone or tablet.

Never enter commands whose purpose you do not know. The thing is that some of them are designed to quickly change critical system parameters or perform a general reset. Moreover, some commands perform a general reset without confirmation, instantly erasing all contents.

The engineering menu is implemented and used by manufacturers of Android smartphones to test and configure various functions. This menu is hidden in the operating system shell and is called only by a special USSD command, or through third party applications. On this page I will post information on how to enter the engineering menu and what data can be changed by the smartphone user.

What is the engineering menu in Android?

Engineering menu (Engineering Mode)- This hidden program in every Android device, which allows you to manage the settings of your gadget. At its core, it resembles the main data processing center in a smartphone. With its help, manufacturers and developers check the operation of hardware parts and sensors and make adjustments.

Warning! When using the engineering menu, be careful when making changes. Rash and negligent actions can lead to malfunctions of the smartphone.

How to enter the engineering menu?

To open it, launch the Phone application, go to dial the number and use one of the USSD commands presented in the table below. Once you have completed typing numbers and symbols, the desired menu will open.

Important! The menu does not work for everyone Android smartphones! In most cases, these are devices with Android 4.2 and smartphones based on Android 5.1. Access to the engineering menu in the Cyanogen Mod firmware is completely blocked. Also on many devices with processors Qualcomm Snapdragon, Intel or Tegra, access to the menu via USSD command is disabled.

USSD command table

The most common login code is *#*#3646633#*#*. Also, in the table you will find other teams from popular manufacturers: Samsung, Xiaomi, Meizu, Sony, ZTE, HTC, LG, Huawei, Lenovo and others.

Advice! Some smartphones have Android versions 4.4.2 changes made in the engineering menu are reset after a reboot.

Alternatively, devices on Qualcomm processor Snapdragon has access to the login, which opens by repeatedly clicking on “Build number”.

Third party application

For devices with MediaTek processors, you can use third-party applications, of which there are plenty in the play market. For example . But on gadgets with other processors, the application will not work!

Also, some devices will not respond to changes or save settings made by the program until they are installed.

What can you find out and configure?

Here you can find useful information, test smartphone parameters and change and configure device functions.

You can watch:

- an identifier that is present in every gadget.
The smartphone number is sometimes not specified.
Network - information about the operator.
Roaming - whether you are in it now or not.
Network information - whether there is service, enabled or not.
Call forwarding - whether used or not.
Network type and index.
Ring tone volume.
Your location in the form of coordinates - with GPS turned on.

The "About the Battery" section provides information:

state ( charging or not);
charge level (indicated as a percentage);
elapsed time since last download;
battery temperature and voltage;

Other sections help you find out information about applications - name, date of last launch, operating time. It is possible to view Wi-Fi data - connection status, data transfer speed, network name, etc.

Tests are also available to identify problem areas in the gadget:

Automatic Test - tests every parameter in the device.
Report - displays a report on the test performed.
Screen test - checking sensitivity, brightness.
Camera test - checking the flashlight, flash.
Test of sensors and adapters - information on testing the accelerometer, gyroscope, etc.
Test of connectors, vibration, speakers, mechanical buttons, SD cards and SIM.

Important! In Android devices, the presence of this or that information in the engineering menu may differ. In one case, there will be more parameters, data and functions than indicated in the article, in the other - only brief information.

You can configure the following parameters (change them thoughtfully and with caution):

Cellular communications (Telephony)- withdrawal of frequencies on which the operator does not work in order to save battery energy consumption (Band Mode section), as well as set the priority of 2G, 3G, 4G networks (Network Selecting section). Right here GPRS setup and IMEI.
Connectivity- changes to Wi-Fi and Bluetooth adapters.
Sound volume (Audio)- decreasing or increasing the maximum sound volume threshold of the speaker, headphones, speakerphone.
Camera- change the image format from .jpeg to .raw, set the image size, enable HDR shooting, change the video frame rate.
R recovery mode ( Recovery Mode) - , firmware update, access to Root rights, creating a backup ().

Also, there are secret commands for Android, which allow you to perform one or another engineering menu operation using a USSD code.

Many of us have long fallen in love with smartphones based on the Android operating system. They have always captivated us with their unpretentiousness, good reliability, as well as convenience and ease of use. The same can be said, in particular, about the well-known smartphones, which are also based on this operating system. The company from the Middle Kingdom always keeps up with the times and equips its phones with the latest versions of the operating system and multifunctional firmware, trying to keep up with the generally recognized leaders in the Android smartphone market.

However, few of us know that there is already enough convenient phones Huawei can be made even better by fine-tuning it to your liking. What we can configure in the phone’s main menu is only the tip of a huge iceberg; the rest is hidden from users in order to avoid device failure. However, people who deal with mobile phones not just at the user level, but, for example, work in a service, can easily access advanced settings on almost any phone using the engineering menu.

Looking ahead a little, it is worth saying that inexperienced users You really shouldn’t go into this “forbidden forest”, so as not to simply ruin your device through carelessness. But if you are confident in yourself and think that you understand technology at a sufficient level, then engineering Huawei menu- this is exactly what you need to fine-tune your device.

The engineering menu gives the user access to manual configuration of almost all phone parameters. Typically, engineer mode is used by developers at the stage of final configuration of the device before it goes on sale. With its help, they check the device for the presence various errors, malfunctions, and also check the functionality of all device systems. In addition, in the engineering menu there is detailed information about the capabilities of the device and its programs.

The engineering menu is built directly into the Android program, however, on some phone models, developers intentionally remove it from the phone after final testing. In such cases, it will be problematic for the owner to customize the device “for himself” directly from the phone and he will either have to use special programs that can be downloaded, for example, on Google Play, or use third-party firmware.

Engineering menu for Huawei smartphones It's usually always there and never removed, so if you didn't get to these settings the first time, then most likely you simply didn't take into account the unique features of your device. It would also be worth repeating once again that if you are not sure what you are doing, and working with such menus is new to you, then you should carefully consider this step. Remember that unsuccessful settings in the engineering menu may not improve the functioning of the smartphone, but, on the contrary, make it much more inconvenient, and if you change the system settings, you lose the warranty and bear full responsibility for the device yourself.

How to get to the engineering menu?

In order to get into the engineering menu of a phone based on the Android operating system, you need to enter a certain number in the phone dialing menu secret code. Most often on Android devices you need to dial the combination *#*#3646633#*#*. This code is suitable for most Android smartphones, but sometimes developers can change it, for example, entering the Huawei engineering menu most often occurs using the codes *#*#2846579#*#* or *#*#2846579159#*#*.

Also, codes can often change depending on the specific device model and the type of single-chip system used in it. Also, it often depends on the phone’s single-chip system whether the smartphone even has a built-in engineering menu or not. So, on devices with MTK processors, such a menu is available on almost every device, but on devices equipped with Kvalcom processors, on the contrary, in most cases this menu is completely absent.

The code should be applied immediately as soon as you enter it on the call screen, but on some phones you sometimes also need to press the call button for the code to work properly. It is also worth noting that the code must be entered and not copied, since otherwise it will not work. It is also quite useless to save such codes in phone book, that is prerequisite To trigger the code it is necessary to enter it manually.

Commands for accessing menus

If you don’t know how to enter the Huawei engineering menu — smartphone, or you can’t do it, then this is not a reason to be upset. Most Huawei devices support the so-called “ service codes", which partially repeat the functions of the engineering menu.

Service codes are used in mobile phones for a very long time and many of them appeared long before the first Android smartphones came out. However, although such codes repeat some of the functions of the engineering menu, using them is not at all as convenient and completely unsafe. Some of them can literally delete all data stored on the phone or disable certain functions of the device. So, if you are not one hundred percent sure what a particular code means, we do not recommend that you use it for the simple reason that they may interfere with the normal functioning of your phone.

Now let's look at some examples of the most useful, in our opinion, engineering codes:

*#06# — using this code you can find out your IMEI address.
*#*#4636#*#* - This code provides you with some information about the phone, namely: device data, battery information, battery statistics and phone usage statistics.
*#*#7780#*#* - this code resets settings such as Google account data, system data and settings, downloaded applications to the factory state.
*2767*3855# — this code performs full formatting smartphone. So think twice before using it.
*#*#34971539#*#* — this code is intended to obtain information about the smartphone’s camera.
*#*#7594#*#* — used to change the on/off button modes.
*#*#273283*255*663282*#*# - using this command you can open the file copying screen and use it to backup your most valuable photographs or audio recordings.

There are also many other service codes that allow you to very carefully check and configure your telephone set. However, due to the fairly large number of them, this will perhaps be a topic for a separate article, and we will move on.

Engineering menu functions

Huawei's engineering menu offers a wide variety of settings for experienced users. On most models of phones from the company from the Middle Kingdom, volume adjustments, camera settings, navigation, telephony and many other functions are available that you can change at your discretion.

In fact, there is nothing complicated in the adjustment itself. Just look for the parameter you need, for example, volume level, open it and experiment with the values until you achieve the ideal result for you. However, let us remind you once again that you should only change those parameters that you are sure of, otherwise you risk getting not a perfectly fitted smartphone, but a piece of irritating plastic.

Telephony

One of the main points that catches your eye when you first enter the engineering menu of an Android Huawei smartphone , This is the telephony menu. In this menu you will have access to many useful settings, including such important points as:

Auto Answer. Here you will be able to enable or, conversely, disable auto answer to an incoming call.

Band Mode. Here you can manually select frequencies for the GSM module. This menu will show you all the frequencies your phone supports. You can uncheck those bands that your mobile operator does not provide, which will ultimately save your battery power.
CFUSetting. This option enables or disables conditional call forwarding.
AT Command Tool. A utility for developers that supports AT commands.
Modem Test. Fine tuning compatibility with various types of devices.
Network Selecting. Here you can also select mobile communication standards (GSM, WCDMA, LTE). For greater energy savings, turn off those not in use.
NetworkInfo. A very convenient option for checking the quality of mobile operator services.
GPRS. Setting up mobile internet connections. A choice of active SIM card is also available.
HSPA Information. 3G network information if this type services are supported by your telecom operator.

Mobile data service preferred. Using this item, you can increase the priority of the Internet over voice traffic. However, be careful, as incoming calls in this case may sometimes not reach you.
Fast Dormancy. Allows you to save some of your phone's energy on third generation networks.
RAT Mode (Phone Info). Using this menu you can select the most used communication standard. However, use with caution, as these settings block the action of the Network Selecting item.
RF De-sense Test. Choice frequency range and a specific channel for testing communication quality.
SIM ME Lock. Makes it possible to configure the regional parameters of the GSM module in manual mode.

Wireless interfaces

It's also very interesting section, which is designed for testing a wide variety of modules designed for wireless information transmission, for example, Wi-Fi or Bluetooth:

Bluetooth. Offers a very wide range of settings and tests for the Bluetooth module for the purpose of testing the reception and transmission of information, as well as for starting the debugging mode.
CDS Information. Data on the parameters of wireless interfaces.
FM Receiver. Checking the FM module.
WiFi. Testing a Wi-Fi module for receiving and transmitting data on a specific frequency channel.
Wi-Fi CTIA. Recording wireless technology testing logs.

Hardware Testing

This service menu for Huawei smartphones offers ample opportunities for testing and configuring the main hardware of the phone. In this engineering submenu, the user will have access to the following items:

Audio. Allows detailed configuration of sound playback parameters.
Camera. Adjust photo and video settings that are not included in the standard camera application.
Driving Current Camera. Reads current data from sensors in camera circuits.
CPU Stress Test. Conducting testing of all device processor subsystems.
Deep Idle Setting. Using this tab, you can disable the use of sleep mode when the device is in standby mode.
Sleep Mode Setting. Adjust sleep mode settings.
ChargeBattery. Detailed information about the battery and its charge.
Sensor. In this tab, the user can fine-tune the device’s sensor.
Multi-Touch. In this menu, you can check and adjust the number of simultaneous touch points of your screen.
Location Engineer Mode. Here the user can check the GPS module data.

That's probably all, dear friends. We hope this article was useful to you and answered most of your questions. We wish you great setup your phone, and let it bring you only pleasant emotions.