Android service codes. Here is a complete list of all secret codes for Android. Sony Service Codes

08.01.2021

The term “secret codes for Android” refers to such combinations of characters that were originally intended for testing devices on which this software is installed. operating system.

With their help, developers test phones and tablets before sending them for sale. And their total number reaches several dozen.

Entering a certain sequence allows you to obtain data or perform actions that are inaccessible to ordinary users.

Contents:

Features of “secret” ciphers

Many users who are faced with the need to use such commands may wonder about the reason for their secrecy.

First of all, combinations of symbols and numbers received this name due to the fact that most owners do not need them.

And there is no mention of these commands in the instructions.

To use any of them, you need to enter the Phone application in the dialer (green or blue handset on the main screen).

Tablets without a 3G module do not have this option by default.

And in order to run the codes, the user must download a special application, finding it in the search “Dialer”.

Combinations for any gadget on Android OS

Information sequences allow you to obtain data about various characteristics of the device and its individual elements:

*#06# – about the IMEI number;
*#*#4636#*#* – about the battery and Wi-Fi network;
*#*#44336#*#* – about the firmware, including the CSC number and build date;
*#*#232338#*#* – about the wireless network address;
*#34971539# – about the gadget’s cameras;
*#*#1234#*#* (although *#2222# works much more often) – about the firmware.

When entering *#*#1111#*#* You can get information about the software version on the screen.

Introduction *#*#2222#*#* shows board information.

Information about the sensor version will be shown by the code *#*#2663#*#* , about RAM – *#*#3264#*#* , and the Bluetooth address data is *#*#232337#*#*.

Commands for verification and tests

There is a separate group for testing the device:

Google Talk service check ensures consistency *#*#8255#*#* ;
to check the display operation - *#*#0*#*#* ;
for testing various parts (from camera to microphone) – *#0*# ;
for the audio test - two at once: *#*#0673#*#* And *#*#0289#*#* .

You can check the operation of the backlight and vibration by entering the combination *#*#0842#*#* .

Tested using the command *#*#232339#*#* and additional *#*#526#*#* .

The check is performed by sending the commands *#*#1472365#*#* (for regular test) or *#*#1575#*#* .

The Bluetooth network is checked via *#*#232331#*#* .

Several Yet useful commands allow you to test the performance of the screen ( *#*#2664#*#* ), motion detectors ( *#*#0588#*#* ) And GSM module (*#*#7262626#*#* ).

A input *#197328640# provides transition to service mode.

Dangerous combinations

There are several options, by introducing which you can make serious changes to the system without the ability to return to its original state.

These include, for example *#*#7780#*#* And *2767*3855# .

The first one ensures that all settings are reset and deleted user installed applications, the second command results in complete reinstallation systems.

Combination *#*#7594#*#* allows you to get rid of the shutdown menu - when you press the corresponding button, or will automatically turn off without asking the user anything.

Code selection *#*#8351#*#* needed to enable registration voice dialing, A *#*#8350#*#* – to turn off this mode.

Subsequence #*5376# used to erase messages, and several combinations for Android type #*3876# , #*3851# And #*2562# reboot the gadget.

Special codes for products from individual manufacturers

There are several combinations that are suitable only for certain models or brands of gadgets. They can be summarized in a small table.

Table 1. codes for certain models mobile devices on Android OS.

brand, model	Team	Action
Sony	05*#	unlocking PUK code
LG, G3	*3845#855#**	entrance to service menu
Samsung, Galaxy S4	*#0011#	go to menu
HTC	##3424# ##33284#	starting the diagnostic process network status information
Motorola	**##786## ##2486##**	reset all settings go to built-in menu

Besides these, there are other commands. The special Secret Codes application from PlayMarket will help you find them. With its help, you can even detect those that are not on the list.

You should know: Not all of the sequences, even universal ones, will work on every smartphone. Limitation of use secret combination may be a self-reinstalled operating system taken not from the official website, but from third-party sources.

Results

Most of them should be used very carefully. Especially those that not only provide some information, but also make changes to the operating system or firmware.

When used correctly they can be quite useful.

Secret codes for Android devices! By entering these codes, you can get information about any Android smartphone and tablet, or change its settings. I would like to note that you need to be very careful with some codes, since after application you will not be able to return the previous settings.

Many Android users smartphones and tablets are not even aware of the existence of so-called engineering or service (secret) codes. Service codes on smartphones and even regular phones appeared much earlier than the first version of the Android OS was released. They are intended mainly for service center engineers and advanced users, so I want to warn readers right away. If you don’t know what this code is for, then you shouldn’t enter it, and if you decide to enter the code, you do it at your own peril and risk. It’s worth thinking before entering any code for Android, because... this may lead to partial or complete loss of data and damage the device itself. If you decide to use codes, let's look at each engineering code.
Please remember that not every code is universal and will work on all devices. Below we present you a list of the most common and most popular combinations for Android devices.

Secret combinations to get information about your phone and tablet!

Find out IMEI:

Information and Settings

Voice Dialer Logging Enabled

*#*#8351#*#*
*# * # 4636 # * # *

This code can be used to get interesting information about the phone and battery. It shows the following 4 menus on the screen:
Phone information
Battery information
Battery Statistics

Usage statistics

*# * # 7780 # * # *

This code can be used to reset factory settings.
Settings Google account recordings are stored in the phone memory
System and Applications and Settings
Downloaded Applications
Does not change:
Current system software and applications included
SD cards files e.g. photos, music files, etc.
PS: Once you enter this code, you will see a screen asking you to click on the “Reset” button. This way you will have the option to cancel the operation

Think before entering this code. This code is used to reset the factory settings. This code will remove all files and settings including internal memory. It will also reinstall the phone's firmware.
PS: Once you enter this code, there will be no way to cancel the operation except to remove the battery from the phone. So think twice before using this code.

*# * # 34971539 # * # *

This code is used to get information about the phone's camera. It shows the following four parameters:
Updating the camera firmware into an image (do not try to repeat this option)
Updating camera firmware in SD card
Get the camera firmware version
Get firmware update no.
WARNING: Never use the first option otherwise your phone camera will stop working and you will have to carry the phone in service center to reinstall the camera firmware.

*# * # 7594 # * # *

This code can be used to change the End/On/Off button mode. By default, when you long press the button, you will be shown a screen asking you to select any option from Silent mode, Airplane mode, and Power off.
You can change the suggested options using this code. For example, you can make the phone turn off immediately, without selecting the desired option from the menu.

*# * # 273283 * 255 * 663 282 *#*#*

This code opens a file manager where you can backup your files, such as Images, sounds, videos and voice memos.

*# * # 197328640 # * # *

This code can be used to enter maintenance mode. You can run various tests and change settings in service mode for WLAN, GPS and Bluetooth

*# * # 232339 # * # * or * # * # 526 # * # * or * # * # 528 # * # * - WLAN (use Menu button to start various tests)
*# * # 232338 # * # * - shows the WiFi MAC address
*# * # 1472365 # * # * — GPS test
*# * # 1575 # * # * - Another GPS test
*# * # 232331 # * # * - Bluetooth test
*# * # 232337 # * # - Shows the Bluetooth device address

Codes for running various factory tests:

*# * # 0283 # * # * – Batch Loopback
*# * # 0 *#*#* — LCD test
*# * # 0673 # * # * or * # * # 0289 # * # * — Melody test
*# * # 0842 # * # * — Device test (vibration test and backlight test)
*# * # 2663 # * # * — Touch screen version
*# * # 2664 # * # * — Touch screen test
*# * # 0588 # * # * — Motion sensor
*# * # 3264 # * # * - RAM version

These are the basic codes for Android that an advanced smartphone user may need

Manufacturers of Android smartphones implement and use the engineering menu to test devices. It contains all kinds of tests and device settings that are not available to ordinary users. However, today, knowing the USSD command or downloading the application from PlayMarket, anyone can go to the engineering menu.

Why do you need a hidden engineering menu in Android?

Engineering Menu (Engineering Mode) is essentially a hidden application that developers use to test and set the optimal parameters of a mobile phone or tablet. Specialists check the operation of the sensors and, if necessary, make adjustments to the functioning of system components.

When working with the Android technical menu, be careful - changing some functions leads to malfunctions of the device.

How to enter the menu

To open the menu installed 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.

Table: combinations for launching Engineering Mode

Device manufacturer	Team
Sony	##7378423##
	##3646633##
	##3649547##
Philips	##3338613##
Philips	##13411##
ZTE, Motorola	##4636##
HTC	##3424##
	##4636##
	##8255##
Samsung	##197328640##
	##4636##
	##8255##
Prestigio	##3646633##
LG	3845#*855#
Huawei	##2846579##
Huawei	##14789632##
Alcatel, Fly, Texet	##3646633##
Smartphones and tablets with a MediaTek processor (most Chinese devices)	##54298##
	##3646633##
Acer	##2237332846633##

Video: how to work in Engineer Mode

If the code does not work and in a standard way it is not possible to start the service menu, use third party applications- You can download them on PlayMarket. Recommended programs - "Startup engineering menu MTK", Mobileuncle Tools, Shortcut Master.

The manufacturer menu does not work on some device models with Android 4.2 JellyBean (x.x.1, x.x.2), as well as on Android 5.1 Lollipop. The menu is also invalid when installed firmware Cyanogen Mod. In Android 4.4.2, when you reboot, changes made in the application are reset.

“Launch the MTK engineering menu”

The application allows you to open and configure the engineering menu without typing digital commands. Works correctly on MediaTek processors (MT6577, MT6589, etc.) and Android systems 2.x, 3.x, 4.x, 5.x. According to user reviews, the program successfully performs its functions, but after rebooting the smartphone, the settings made using the application are reset.

Mobileuncle Tools program

The functionality of the application is similar to the previous one, but, in addition to accessing the engineering menu, the user has the opportunity to view information about the screen, sensor and device memory, as well as update the firmware, restore the IMEI number and improve GPS. For stable operation, root rights are required.

Shortcut Master utility

The Shortcut Master program is designed to work with shortcuts and system applications: creating, searching, deleting. It does not have a direct function for entering the engineering menu. But with its help you can view the 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.

Root rights to access the engineering menu

To get to the service menu on some versions of Android, the user must have superuser rights (root). You can obtain rights using specialized applications: Farmaroot, UniversalAndRoot, Romaster SU and others. To get Root access to your device using Farmaroot:

Install and run into the program. Link in Google Play: https://play.google.com/store/apps/details?id=com.farmaapps.filemanager&hl=ru.
If the application supports installing 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 preset root methods.
The program will begin installation.
At the end of the procedure, you will see a message about the successful installation of root access.

Possible problems and solutions:

the application closed mid-installation - restart the device and try again;
root rights are not installed - try installing 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 ability to adjust parameters may vary depending on the tablet or smartphone model. In the menu, users most often adjust the sound, change camera settings and use recovery mode. The parameters for adjustment and the procedure are given below. Be careful - menu item names may vary depending on various models devices! You act at your own risk.

Audio: Increase volume level

If your phone does not ring loudly enough, find the Audio section in the engineering menu and go to LoudSpeaker Mode. Select Ring. For each signal level (level 1–6), change the values - set the numbers in ascending order, from 120 to 200. Increase the value in the Max item. Vol - maximum 200. Press the SET button to save the settings.

Audio: Increase phone call volume

To enhance the speaker tone for conversations, in the Audio service menu section, select Normal mode and open the Sph item. Set the values for signal levels (level 1–6) from 100 to 150, and the number for Max. Vol. – up to 160.

To increase the sensitivity of the microphone, go to the menu Audio - Normal mode - Mic. For each level, assign the same microphone sensitivity values, for example, 200. Press the SET button, reboot and check whether the other party can hear you better.

Video: adjusting sound parameters in the engineering menu

Battery: Disable unused frequencies

Smartphones quickly consume battery life running applications, maintaining cellular communication And network connections. Using the engineering menu you can increase the battery life.

Modern devices scan several GSM frequencies - 900/1800 MHz and 850/1900 MHz. In Russia there is a pair of 900/1800 MHz, which means 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 SIM1 and SIM2 items one by one and perform the indicated steps in each. Press the SET button to save the settings.

If your smartphone and SIM card operate in 3G networks, disable the networks that are not used in Russia: WCDMA-PCS 1900, WCDMA-800, WCDMA-CLR-850. Press the SET button again.

You can enable scanning of disabled networks by returning to the same menu and checking the boxes.

Camera: photo and video settings

By default, Android devices save pictures in JPEG format. Meanwhile, photographers prefer to shoot and process material in RAW to gain more editing options. The technical menu allows you to select the desired image format.

Find Camera in the menu and select Capture Type. Set the photo format to RAW and press SET. Also in the Camera menu you can increase the size of pictures, set the ISO value, enable shooting in HDR for higher photo detail, and set the frame rate for videos. After changing each parameter, remember to press SET to save the settings.

Recovery Mode

Recovery Mode(Recovery mode) – analogous to Bios on a computer, allows you to control the device without logging into Android system. Recovery mode features:

resetting settings to standard;
firmware update;
access to root rights;
Creation backup copy OS;
removal of personal data from the system.

In Recovery Mode, do not perform an action if you are not sure what it will lead to. Some commands may harm the device and 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 parameters, tap on the SET button at the bottom of the screen. If the parameters are reset after rebooting the device, try accessing the technical menu not through the application, but using a digital command.

Service codes for Android devices

In addition to the technical menu, secret USSD codes - combinations of numbers and symbols, which the user types by typing to perform an action, allow you to control the functionality of Android smartphones. Secret codes for different devices are given in the table.

Table: list of secret commands for Android

Manufacturer	Digital Team	Meaning
Codes for most manufacturers	##7780##	Rolling back settings and uninstalling user applications
	27673855#	Firmware change, total settings rollback.
	##232339## ##526##	Checking wireless connections
	##34971539##	Camera details
	##232338##	View Wi-fi address
	##273283255663282##*	Activating media backup on your phone
	##1472365##	Express GPS test
	##0##*	Checking the screen
	##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##	Testing Bluetooth Communications
	##8255##	Checking Google Talk
	##232337##	Bluetooth address information
	##1234##	Device firmware data
	##44336##	Device build date
	*#06#	IMEI number information
	##197328640##	Service activity test
	##1111##	Free-to-air version of programs
	##2222##	Iron number for free-to-air
	##0588##	Checking the proximity sensor
Sony (unified commands apply to devices)	05*#	Unblocking a PUK code
Motorola	*#06#	IMEI
	##786##	Reverting settings to original
	##1234## ##7873778##	Opening applications with root rights
	##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##	Functionality test
	##3424#	Device diagnostics
	##7738#	Protocol diagnostics
	##8626337#	Voice Coder
Samsung (generic codes are effective)	##778 (+call)	Activation of EPST menu
LG (working with codes is replaced by the technical menu)	3845#*855#	International devices
	3845#*400#	Chinese devices
	5689#*990#	Sprint
	##228378 (+ call)	Verizon Wireless
	3845#*851#	T-Mobile
	3845#*850#	AT&T

If for some reason the service code did not work, do not worry - install and run the Secret Codes application (Link on Google Play: https://play.google.com/store/apps/details?id=fr.simon.marquis. secretcodes&hl=ru). The program will analyze the combinations active in the device and offer you a list. You can activate the combination directly in the application with one click on the name.

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, Android has a special subroutine built into it - the engineering menu, which provides access to hidden settings of the Android OS and allows you to reconfigure them yourself. In addition, the menu contains detailed information about the device. The full list of menu options is known only to the platform developers, so you should make your changes 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. 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.

The first option is Mobileuncle MTK Tools. In addition to the necessary set of settings, this program has several additional functions: firmware update, recovery update, GPS receiver improvement 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: installation third party firmware. Assemblies from third-party developers often contain a wide range of customizable settings.

Where to begin

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

Engineering menu settings

Settings open huge opportunities for users.

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

In this section you can configure settings mobile communications.

Auto Answer. You can enable or disable automatic answering of an incoming call.
Band Mode. Allows for manual mode choose frequency range for GSM module operation. 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 cellular communication parameters. Once selected, open the additional menu (three dots in the upper right corner) and click Check Information. This option is convenient for checking the quality of cellular operator services.
GPRS. Setting up a connection to the mobile Internet, selecting an active SIM card (if there are several of them).
HSPA Info. Information about the 3G network if supported by your mobile operator.
Mobile data service preferred. The Internet will be a priority voice traffic to increase data transfer speed. 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 answer Enable or disable conditional forwarding Configure the “Modem” mode Display information from the GSM module Configure Mobile Internet Select the priority of the connection type Configure the operation of the 3G mode Select the type of mobile connection Check the network power Configure regional communication parameters

Wireless interfaces

This section is intended for testing wireless data transmission modules (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. Parameter Information 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 verification section wireless modules devices Check the mode bluetooth work Find information about wireless interfaces Configure the FM module Check the operation of the WiFi module Write data about testing the WiFi module to a log file

Audio- fine tuning sound playback settings.
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 of the 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 - checks the number of available points for simultaneous pressing on the screen.
Location Engineer Mode - checking the parameters of the GPS module.

Photo gallery: equipment testing

Go to the verification section electronic components We adjust the volume of the conversation speakers We configure the camera's power supply We configure the standby mode We adjust the frequency of the central processor We configure the sleep mode We look at information about the battery We configure touch screen Checking the capabilities of the multi-touch function Setting up the GPS module

Adjusting the speaker volume

In the subsection you can configure general level volume, headphone playback volume and speakerphone.

You should be careful when changing volume settings. All parameters are individual for a specific device model. 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. The higher the 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. Don't forget that gaining root access can damage your gadget and will void the device's warranty. We strongly recommend doing backup important information to a memory card and synchronize 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 differs in a slightly larger number of 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 newcomers to the world of mobile devices. However, it should be noted that manipulations with the engineering menu can render the gadget inoperative.

Android engineering menu and secret codes. What does the Android OS allow you to configure through the engineering menu? Sound volume, sensors and much more, read about all this in our article.

Our smartphones carry a lot of secrets that are hidden by manufacturers. Do you know anything about the engineering menu on Android? Have you heard about secret codes? Since they opened our article, it means they heard something remotely. All these tools appeared at the birth of the first mobile phones, but, as is natural, over the years they became more functional and understandable.

However, it is worth noting right away that the manufacturers’ plans do not include making the engineering menu or secret codes for (as the name implies) available to everyone. And this makes sense. Let's go in order.

What is the Android engineering menu, secret codes?

So, Engineering Mode (engineering menu) is a special application that is installed on almost any smartphone. Used by the manufacturer to conduct various tests and optimize the operation of functions, sensors and other parameters of the phone or tablet.

By default, it is hidden in the system so that every user cannot access it. Called, as a rule, using a small code entered using a standard dialer. Thanks to its extensive capabilities, the engineering menu can be accessed and managed using third-party applications.

Why is the engineering menu hidden? If you use the application's capabilities carelessly, you can damage your smartphone or other device. As noted above, the engineering menu is intended for manufacturers (developers, for conducting tests). Therefore, you should be careful when making any changes here.

Secret codes for Android (service, engineering) are somewhat different from the menu considered. If the engineering menu provides access to many parameters at once, then one entered service code leads to only one, as a rule, function. There are a lot of codes.

Moreover, there are both universal ones (work on most Android smartphones, even mobile phones), and codes for specific models devices. We'll look at the most popular ones a little later.

How to access the engineering menu on an Android device - codes

Android engineering menu - the most popular code

There are two popular ways: through a secret code or using special software. Naturally, the first method is simpler and more reliable, but not without nuances. There is no universal code that will definitely take you to the engineering menu.

On one smartphone one triggers, on another – another, on a third – a third. However, Android is not the first year, so users have developed the most popular codes that work on most devices. So:

*#*#3646633#*#* – the most common entry code into the Android engineering menu;
*#15963#* and *#*#4636#*#* – if the previous one did not work, try these;
*#*#7378423#*#* or *#*#3646633#*#*or *#*#3649547#*#* – used on smartphones from Sony;
*#*#3424#*#* or *#*#8255#*#* – we draw the attention of owners of HTC devices;
*#*#197328640#*#* – in some cases it works on Samsung;
3845#*855# – often used to access the engineering menu on LG Android smartphones;
*#*#54298#*#* – works on many devices with a MediaTek processor;
*#*#2846579#*#* or *#*#14789632#*#* – and Huawei has its own set of codes.

At least one, but it should work on your device. Simply enter the code using the dialer (Phone application on the desktop). As a rule, you don’t even need to press the call button (not always) - after dialing, the service will automatically start. But not everything is so simple; there are certain difficulties in launching the engineering menu on some Android phones.

I can’t enter the Android engineering menu: reasons

Firstly, many smartphones or tablets with Qualcomm Snapdragon, Intel or Tegra processors either do not have a menu or are very difficult to access. In some cases, you don't even have to try.
secondly, the cause of the problems may be custom firmware. In a number of them, access to configuration tools is simply absent or blocked. For example, you will not find an engineering menu in the CyanogenMod firmware, which is very popular among users. The reason is simple - the firmware was originally developed for Snapdragon-based devices.
thirdly, the source of the problems may be the manufacturer himself, who hid the engineering menu more reliably or decided to remove it altogether. This also includes various types of errors from which none of the devices are insured.

Actually, solutions to problems lie on the surface. If the smartphone is powered by Snapdragon, Intel or Tegra, then in most cases nothing can be done. However, even on these devices you can access a number of hidden settings, which we will talk about below.

By the way, on Xiaomi smartphones, which are mostly based on chips from Qualcomm, engineering can be accessed by clicking several times on “Kernel version” in the smartphone settings (section “About phone”). Finally, in some cases, flashing your Android device to stock (official) firmware will help.

The second way to open access to the engineering menu is through applications. There are quite a few of them, you can download them for free from, but almost all of them are designed for smartphones based on the MediaTek processor.

Again, it is not a fact that each of the programs will work smoothly on your device - there are a hundred reasons why they will refuse to function. These tools are developed by small companies, so you'll probably have to try a few.

What can be configured in the engineering menu?

How appearance interface and the set of settings for settings may differ for different smartphones. If you take a Qualcomm Snapdragon device, then often all you can do is look at information about the various modules and perform some tests.

You will not be able to make any changes to the parameters. But MediaTek smartphones offer much more options: sound configuration, network settings, various modules, and so on.

So, regardless of the fact that the external interface of the engineering menu may differ by different devices, it won’t be difficult to figure out the points. Let's go through the main features.

Once again, you make changes at your own risk. Don't change the values of parameters you don't know anything about.

Informative features of the Android engineering menu

The first thing the Android engineering menu offers is to study various information about the device. It mainly concerns the network, wireless interfaces and battery (on smartphones with Snapdragon processors using the command *#*#4636#*#*). What can you see in these sections:

Phone IMEI is a special (unique) number that is assigned to each smartphone;
Phone number – not always indicated;
Network – the current operator is indicated;
Roaming – whether you are there or not;
Information about the network - whether it is being serviced or not, enabled or disabled;
Call forwarding – whether used or not;
Network type, network index;
Signal volume and your location in the form of coordinates.

In the "About the battery" section:

Status: charging or not;
Charge level (in percent);
Voltage and temperature;
The technology used to produce the element;
Time since last reboot.

One of the sections allows you to view information about the use of applications on your smartphone (name, date of last launch, duration). In addition, a separate section of the engineering menu on Android is dedicated to the wireless interface. Here you will find information about the connection status, the name of the network, you can find out the speed and some other data.

Testing smartphone parameters in the engineering menu

Enough interesting opportunity engineering menu, which allows you to test various parameters of the smartphone. It often helps to find the source of the problem that is causing the system to not function properly. What specific tests can be performed:

Comprehensive (Automatic Test) – every parameter of the smartphone is tested;
Report – provides a test report;
Testing buttons, memory cards and SIM cards, vibration, speakers, connectors - all this can be checked for functionality;
Screen tests - for brightness, sensitivity, etc.;
Testing cameras and flash, flashlight, wireless interfaces and sensors (gyroscope, accelerometer and others).

Again, the range of testing options may vary. It all depends on the engineering menu of a particular Android device. Undoubtedly useful features, which will be useful to many users. For example, when purchasing a used smartphone, you can test the screen for functionality.

Changing settings in the Android hidden menu

If there is nothing to be afraid of when testing or studying information about a phone or tablet, then you need to make changes carefully.

It’s better not to touch parameters at all, the purpose of which you don’t know, and also take screenshots or mark on a piece of paper everything that you change. If problems arise, you can return the options to their default values. Let's look at the most interesting sections here.

Setting up cellular communications (Telephony) and changing IMEI

Android engineering menu - frequencies

Settings for changing network parameters are concentrated here. You are unlikely to be able to disable your smartphone by changing these parameters, but the network search can be disrupted, so remember where you take pictures and where you put the checkmarks, so that in the future, if anything happens, you can return everything to its place.

As a rule, changes in this section are made in order to reduce energy consumption.

Firstly, you can deselect frequencies (subsection Band Mode) on which your operator does not work. Let's find out what ranges yours operates in mobile operator, uncheck all the others. This will help reduce energy consumption a little, since it will know exactly which frequencies to connect to.

In the same subsection, on the contrary, you can turn on the desired frequencies. This is needed when the manufacturer from the factory does not activate the necessary ones for your region. For example, often “out of the box” Chinese smartphones cannot work in Russia with LTE. The service menu on Android will help solve this problem.

Secondly, in subsection Network Selecting we can set the priority of the networks that are used for access (2G, 3G, 4G). Everything is done for the same purpose: increasing time battery life from the battery. As a rule, 3G and/or 4G networks are turned off. Not every region has support for these networks, and the communication module, be that as it may, continues to search for them, consuming energy. Turned it off and no problem. In addition, the device will not switch to 3G or 4G, wasting traffic.

To subsection GPRS, it’s better for us, ordinary users, not to get into it unless there is a good reason for it. Here are the various settings for the smartphone to work with the network, and there is also an item for changing IMEI.

Attention! There were precedents for criminal prosecution for illegal shifting IMEI numbers. More often the punishment is a fine or a suspended sentence. However, there were cases of actual imprisonment.

The IMEI change function can be useful after an unsuccessful firmware attempt, when the identification number “flies off”. Then you can simply copy it from the box the device came in.

Connectivity

Here, as in the case of GPRS, most people have nothing to do. The section itself is intended for making changes to the settings of Wi-Fi and Bluetooth modules. In this section you won’t be able to configure anything to make your smartphone work better, but you can easily harm your electronic friend.

Therefore, here we use only testing functions, and if it is necessary to make some corrections to return the device to a working state, we carefully study the purpose of each parameter on the Network.

Setting the sound volume in the Android engineering menu (Audio)

Android engineering menu - volume adjustment

Judging by the number of queries in the search, it is in order to increase the volume that Android users resort to the engineering menu. It's quite simple:

Select the Hardware Testing -> Audio tab. Select the desired mode;

Normal Mode – is responsible for outputting sound to the main speaker.
Headset Mode – it is used to adjust the sound volume in the headphones.
LoudSpeaker – includes settings for adjusting sound parameters during speakerphone calls.
Headset_LoudSpeaker Mode – allows you to increase or decrease the sound volume for speakerphone mode with connected headphones.

Now from the drop-down list we select for which device we will adjust the volume in the Android engineering menu;

Sip – options for Internet telephony. Mic – sets the microphone sensitivity. Sph (maybe two) – setting the earpiece speaker. Media – multimedia speaker (main). Finally, an item that is best left untouched is Sid. After changes, an echo may appear.

The “Level” line specifies the volume level value, which is associated with each step (click) of the volume rocker. The default is 0. You can leave it alone, unless, of course, the sound on your device jumps sharply when you press a button.
The “Value is” line specifies the value of each step (volume level);
The most interesting line is “Max Vol”, with which the maximum volume on Android is increased through the engineering menu.

As a rule, the smartphone manufacturer does not set the maximum value, so we can correct it ourselves. Please note that at the highest level the speaker wheezes. To choose the most comfortable value, we go through the options.

Secret codes for Android

In addition to the engineering menu, to access various functions you can use secret codes. Here it is also difficult to predict which of the commands will work on your device. Let's look at the most popular and useful:

*#06#	Getting the IMEI of the smartphone
##232338##	Find out the MAC address and Wi-Fi information
##232337##	Will show Bluetooth address
##3264##	Displays information about RAM
##1234## ,	Let's learn everything about the software part
##2663##	View screen sensor data
*#34971539#	Displays information about installed camera sensors
#0#	Used for comprehensive smartphone test
##0##*	Useful screen for testing
##2664##	Runs a display sensor test
##0842##	Performs a vibration test
##0289##	Useful for sound testing
##1575##	Starts GPS module testing
##7262626##	Used to check mobile communications
##7780##	Resetting your smartphone - completely or partially
#*5376#	Erases all SMS from your smartphone
#*3851#	Useful for rebooting the device
*#2263#	Setting up network ranges
##273283255663282##*	Causes files to be backed up