Honor 4x engineering menu. Engineering menu of Huawei smartphones. Service codes for Android devices
Mobile technology from Huawei and its separate brand Honor, running the Android operating system, has firmly established itself in the modern market. In addition to extensive device configuration in its own EMUI shell, developers also provide access to in-depth changes to system parameters in the engineering menu. After reading this article, you will learn how to access it.
Go to the Huawei service menu
The engineering menu is a settings panel in English, in which you will be able to change various parameters of the gadget and complete information about it. These settings are used by developers during the final testing of the device, immediately before its release for sale. If you are not sure of your actions, then do not change anything in the menu, as this may lead to unstable operation of your smartphone or tablet.
In conclusion, I would like to add that in case of inept or incorrect manipulations in this menu, you can only harm your gadget. So think carefully about whether a speaker that isn't loud enough or experimenting with your camera is worth it.
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 already quite convenient Huawei phones can be made even better by fine-tuning them to suit your needs. 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’s worth saying that inexperienced users really shouldn’t go into this “forbidden forest”, so as not to simply ruin their device through carelessness. But if you are confident in yourself and think that you understand technology at a sufficient level, then the Huawei engineering menu is exactly what you need to fine-tune your device as much as possible.
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 various errors, malfunctions, and also check the functionality of all device systems. In addition, the engineering menu contains 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 deliberately remove it from the phone after final testing. In such cases, it will be problematic for the owner to configure the device “for himself” directly from the phone and he will have to either use special programs that can be downloaded, for example, on Google Play, or use firmware from third-party developers.
The engineering menu for Huawei smartphones is usually always in place and is never deleted, so if you were unable to get into these settings the first time, then most likely you simply did not take into account the unique features of your device. It is also worth repeating once again that if you are not sure of 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 secret code in the phone dialing menu. 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 the phone book, that is, manual entry is a prerequisite for the code to work.
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 so-called “service codes”, which partially duplicate the functions of the engineering menu.
Service codes have been 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 a complete formatting of the 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 copy screen and use it to backup your most valuable photos or audio recordings.
There are also many other service codes that allow you to very carefully check and configure your telephone. 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 the Android smartphone Huawei , This is the telephony menu. In this menu you will have access to many useful settings, including such important items 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 different 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. Information about the 3G network if this type of service is 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. Selecting a 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
This is also a very interesting section, which is intended for testing a wide variety of modules designed for wireless information transfer, 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 excellent setup of your phone, and may it bring you only pleasant emotions.
MASTER SECURITY CODE
309296
3092
9296
ANDROID secret codes for HUAWEI Honor 4C (Black)
DISCLAIMER: This information is intended for advanced users. It is not intended for ordinary users, hackers or mobile thieves. We will not be responsible for the use or misuse of this information, including loss of data or damage to equipment. So use these codes at your own risk and to your advantage.
Code: - *#*#4636#*#*
This code can be used to obtain information about your phone and battery. The following 4 menus are displayed on the screen:
*Phone information
* Battery information
* Battery history
* Usage statistics
Code: - *#*#7780#*#*
This code can be used to perform a factory reset. It will remove the following things:
* Google account settings stored on your phone
* System and application data and settings
* Downloaded apps
This will NOT delete:
*Current system software and associated applications
* SD card files such as photos, music files, etc.
PS: After you enter this code, you will see a window asking you to click the “Reset phone” button. This gives you the option to cancel your operation.
Code: - *2767*3855#
Think before entering this code. This code is used for factory reset. It will delete all files and settings including internal memory. It will also reinstall the phone's firmware.
PS: Once you enter this code, you will not be able to cancel the operation until you remove the battery from the phone. So think twice before entering this code.
Code: - *#*#34971539#*#*
This code is used to get information about the phone's camera. Shows the following 4 menus:
* Camera firmware update in image (don't touch this option)
* Updating camera firmware on SD card
* Get camera firmware version
* Get firmware update counter
WARNING. Never use the first option, otherwise your phone's camera will stop working and you will need to take your phone to a service center to reinstall the camera firmware.
Code: - *#*#7594#*#*
This code can be used to change the behavior of the End Call/Power button on your phone. By default, if you long press the button, a screen will appear asking you to select any option from silent mode, airplane mode, and power off. You can enable direct shutdown by pressing this button so as not to waste time on selection.
Code: - *#*#273283*255*663282*#*#*
This code opens the file copy screen where you can backup your media files such as photos, audio, video and voice notes.
Code: - *#*#197328640#*#*
This code can be used to enter service mode. You can run various tests and change settings in service mode.
WLAN, GPS and Bluetooth Test Codes:
*#*#232339#*#* OR *#*#526#*#* OR *#*#528#*#* - WLAN test (Use the Menu button to run various tests)
*#*#232338#*#* - Shows WiFi MAC address MAC address (Media Access Control) is also called Hardware Address or Physical address. This is a unique address that is assigned to all network adapters at the factory.
*#*#1472365#*#* - GPS test HUAWEI Honor 4C (Black)
*#*#1575#*#* - Another GPS test The Global Positioning System (GPS) navigation system is part of the NAVSTAR complex, which is developed, implemented and operated by the US Department of Defense. The development of the NAVSTAR complex (NAVigation Satellites providing Time And Range - a navigation system for determining time and range) began back in 1973, and already on February 22, 1978, the first test launch of the complex was carried out, and in March 1978, the NAVSTAR complex began to operate.
*#*#232331#*#* - Bluetooth test HUAWEI Honor 4C (Black)
*#*#232337#*# - Shows the Bluetooth device address
*#*#8255#*#* - This code can be used to launch GTalk Service Monitor.
Codes for obtaining information about the firmware version:
*#*#4986*2650468#*#* - PDA, Phone, H/W, RFCallDate
*#*#1234#*#* - PDA and Phone
*#*#1111#*#* - FTA SW Version
*#*#2222#*#* - FTA HW Version
*#*#44336#*#* - PDA, Phone, CSC, Build Time, Changelist number
Codes for running various factory tests:
*#*#0283#*#* - Packet 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#*#* - Proximity sensor test
*#*#3264#*#* - RAM version HUAWEI Honor 4C (Black)
STANDARD GSM CODES HUAWEI Honor 4C (Black)
These codes, dialed from a GSM phone, are used to enable or disable various standard features and services. Some of them duplicate menu functions, some do not.
Legend:
@ = send button (Handset, OK, YES, Navi)
** = enable or activate
* = active
## = turn off and deactivate
# = inactive
CHANGING PIN CODE HUAWEI Honor 4C (Black)
Change PIN 1 **04*oldPIN1*newPIN1*newPIN1#@
Change PIN 2 **042*oldPIN2*newPIN2*newPIN2#@
Unblock PIN 1 **05*PUK*newPIN1*newPIN1#@
Unblock PIN 2 **052*PUK2*newPIN2*newPIN2#@
PUK is a code that must be provided by the operator when purchasing a phone or connecting. If this code is missing, or the wrong PUK is entered ten times, your phone will be completely blocked!
SHOW IMEI HUAWEI Honor 4C (Black)
Show IMEI *#06# IMEI (from English International Mobile Equipment Identity) is a 15-digit international identifier for mobile gadgets. Essentially, this is a serial number that is determined by the operator when the phone is connected.
If the code obtained by entering this command and the code on the back cover of the phone do not match, then your phone may be “gray”.
CALL FORWARDING HUAWEI Honor 4C (Black)
Deactivate all types of forwarding ##002#@
Deactivate all conditional redirects ##004#@
Activate all conditional forwardings **004*phone_number#@
FORWARD ALL CALLS HUAWEI Honor 4C (Black)
Deactivate and Disable call forwarding to another number ##21#@
Deactivate call forwarding to another number #21#@
Set a number and activate call forwarding to another number **21*phone_number#@
Activate call forwarding to another number *21#@
Check the status of call forwarding to another number *#21#@
FORWARDING IN CASE OF NO ANSWER TO THE CALL
Activate call forwarding to another number if the subscriber does not answer **61*phone_number#@
Deactivate and turn off call forwarding if the subscriber does not answer ##61#@
Deactivate call forwarding if the subscriber does not answer #61#@
Activate call forwarding if the subscriber does not answer *61#@
Check call forwarding status if the subscriber does not answer *#61#@
FORWARDING IF THE SUBSCRIBER IS OUT OF COVERAGE AREA
Activate call forwarding to another number if the subscriber is outside the coverage area **62*phone_number#@
Activate call forwarding if the subscriber is outside the coverage area *62#@
Deactivate and disable call forwarding if the subscriber is outside the coverage area ##62#@
Deactivate call forwarding if the subscriber is outside the coverage area #62#@
Check forwarding status if the subscriber is outside the coverage area *#62#@
FORWARDING IF THE PHONE IS BUSY
Activate call forwarding to another number if the phone is busy **67*phone_number#@
Activate automatic call forwarding if the phone is busy *67#@
Deactivate and turn off call forwarding if the phone is busy ##67#@
Deactivate call forwarding if the phone is busy #67#@
Check the status of automatic forwarding if the phone is busy *#67#@
SETTING THE NUMBER OF BEEPING BEFORE ACTIVATING FORWARDING
N = 5-30 (seconds)
Set the number of beeps **61*VoiceMail Number**N#@
Cancel previous installation ##61#@
Change call barring password **03*330*oldPassword*newPassword*newPassword#@
Activate barring of all outgoing calls **33*Password#@
Deactivate barring of all outgoing calls #33*Password#@
Check the status of barring all outgoing calls *#33#@
BARING ALL CALLS HUAWEI Honor 4C (Black)
Activate call barring **330*Password#@
Deactivate barring of all calls #330*Password#@
Check the status of barring all calls *#330*Password#@
BARRYING ALL OUTGOING INTERNATIONAL CALLS HUAWEI Honor 4C (Black)
Activate barring of all outgoing international calls **331*Password#@
Deactivate barring of all outgoing international calls #331*Password#@
Check the barring status of all outgoing international calls *#331#@
BARRYING ALL OUTGOING CALLS HUAWEI Honor 4C (Black)
Activate barring of all outgoing calls **333*Password#@
Deactivate barring of all outgoing calls #333*Password#@
Check the status of barring all outgoing calls *#333#@
BARRYING ALL INCOMING CALLS HUAWEI Honor 4C (Black)
Activate barring of all incoming calls **35*PW#@ or **353*Password#@
Deactivate barring of all incoming calls #35*PW#@ or **353*Password#@
Check the barring status of all incoming calls *#35#@ or *#353#@
BARRYING ALL INCOMING CALLS WHEN ROAMING
Activate barring of all incoming calls when roaming **351*Password#@
Deactivate barring of all incoming calls when roaming #351*Password#@
Check the status of barring all incoming calls when roaming *#351#@
Activate call waiting *43#@
Deactivate call waiting #43##@
Check call waiting status *#43#@
SENDING or BANING SENDING YOUR PHONE NUMBER WHEN CALLING
Prevent sending your phone number #30#phone_number@
Allow sending your phone number *30#phone_number@
Check the parcel status of your phone number *#30#
CODES FOR SENDING/BANING NUMBER IDENTIFICATION FOR INCOMING CALLS
Prevent the caller's number from being displayed on your phone *77#
Allow caller ID to be displayed on your phone #77#@
Check the caller number display status on your phone *#77#@
Questions and comments about secret codes for HUAWEI Honor 4C (Black)
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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#*#* |
| *#*#13411#*#* | |
| ZTE, Motorola | *#*#4636#*#* |
| HTC | *#*#3424#*#* |
| *#*#4636#*#* | |
| *#*#8255#*#* | |
| Samsung | *#*#197328640#*#* |
| *#*#4636#*#* | |
| *#*#8255#*#* | |
| Prestigio | *#*#3646633#*#* |
| LG | 3845#*855# |
| Huawei | *#*#2846579#*#* |
| *#*#14789632#*#* | |
| Alcatel, Fly, Texet | *#*#3646633#*#* |
| Smartphones and tablets with a MediaTek processor (most Chinese devices) | *#*#54298#*#* |
| *#*#3646633#*#* | |
| Acer | *#*#2237332846633#*#* |
Video: how to work in Engineer Mode
If the code does not work and you cannot launch the service menu using the standard method, use third-party applications - you can download them on PlayMarket. Recommended programs - “Launch the MTK engineering menu”, 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 the Cyanogen Mod firmware is installed. 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 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.
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 the program. Link to Google Play: //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 - the names of menu items may differ in different device models! 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 drain battery life running applications, maintaining cellular communications, and network connections. Using the engineering menu you can increase the battery life.
Modern devices scan several GSM frequencies - 900/1800 MHz and 850/1900 MHz. In Russia there is a 900/1800 MHz pair, 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 is an analogue of Bios on a computer, it allows you to manage the device without logging into the Android system. Recovery mode features:
- resetting settings to standard;
- firmware update;
- access to root rights;
- creating a backup copy of the OS;
- removal of personal data from the system.
In Recovery Mode, do not perform an action if you are not sure what it will lead to. Some commands 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 the 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 |
| *2767*3855# | Firmware change, total settings rollback. | |
| *#*#232339#*#* *#*#526#*#* |
Checking wireless connections | |
| *#*#34971539#*#* | Camera details | |
| *#*#232338#*#* | View Wi-fi address | |
| *#*#273283*255*663282*#*#* | 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#*#* | Vibrate 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 (devices use the same commands) | **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 (Google Play link: //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.
