Advanced users of modern smartphones and tablets take advantage of the numerous features that come with engineering Android menu. It allows you to obtain information about the mac address, check or configure the operation of Wi-Fi, Bluetooth, update the software of the camera, speakers. Very often, using such a menu you can improve the sound on your device and make other fine adjustments. For example, return the original settings Google account, specify settings for blocking and turning off the device, set settings that allow you to create a backup copy important information. Before entering the engineering menu, you need to understand that rash actions can lead to a malfunction of the device. It is advisable for the user to remember what changes were made to the system in order, if necessary, to return all settings to their previous state.
How to enter the engineering menu using the standard capabilities of the device?
The list of functionality can be opened by typing a specific combination of characters in the device call window. The Android engineering menu code varies depending on the brand of phone or tablet. Each manufacturer sets its own combination. Such information is usually indicated in the instructions for the phone and on official websites. For users modern devices Usually there are no difficulties in finding the required code.
Below we provide a table of the most common combinations. It is not recommended to use them unless your device is one of the listed brands.
The developers do not recommend executing such commands without certain knowledge and experience. But often only this method helps to quickly solve a number of problems related to returning the device to its original state, receiving additional information about the device. Engineering menu presented on English language, making it understandable for most users.
Using additional programs
It is not always possible to find out the combination that is suitable directly for your device. In such situations, you can install special software on your mobile device, which will allow you to open a list of the functionality of your smartphone or tablet with a few clicks. It is publicly available for different versions of Android and device models.
The program for entering the Android engineering menu can be installed via a USB connection to a personal computer or laptop. One of them is called Mediatek Engineer Mode. It is a file EnMode.apk, which must be transferred to the device memory and installed in the usual way. This program is suitable for devices operating on the MTK processor. The user has the opportunity to download free and paid versions of the software. 
In the shop Google Play It is possible to download the Mobileuncle MTK Tools utility. It is designed for smartphones and tablets running Android 2.1. and later versions. The description says that such a utility is also only suitable for devices equipped with an MTK processor.
The Mobileuncle Tools program is suitable for owners. There are other utilities, for example, Shortcut Master, MTK engineering menu, launching MTK engineering menu. Before installing them, we recommend that you read the application rating, reviews from other users, and also check your device for compatibility.
Setting up optimal sound by opening the engineering menu
One of the most common reasons The reason why users are looking for information on how to enter the engineering menu is the need to fine-tune the sound. The following situations may occur:
- Poor audibility when the speakerphone is on
- Sudden changes in sound when incoming call while listening to audio
- Insufficient signal volume
- Quiet sounds while recording video
- Quiet operation of the headset and microphone.
This is just a small list of installed settings that can be changed through the engineering menu of a modern mobile device. Sound settings are done through the Audio section, which is displayed immediately after entering the menu. Then various tabs will appear on the screen, such as Headset Mode. This tab allows you to set sound parameters that are activated when you connect a headset. Normal Mode sets the sound in the normal state of the mobile device (without connecting headphones or speakers).
LoudSpeaker Mode tab, which are activated when the loudspeaker is turned on. Headset LoudSpeaker Mode allows you to make settings for the active loudspeaker mode while a headset is connected to it. The Speech Enhancement tab provides settings that come into play when communicating over a mobile network.
In any of the modes, you can fine-tune the microphone or increase the volume (see table).
The volume of any sound parameter has seven levels - from 0 to 6. The higher the value, the louder your device will sound. We do not recommend installing maximum settings, because it promotes fast . In many devices, setting the volume to maximum can result in unpleasant noise.
The engineering menu is a fine-tuning mechanism mobile devices operating on Android platform. For developers, the list of such features opens up new options when implementing applications. Of course, such a menu is used not only for adjusting sound parameters. It is an essential tool for keeping smartphones and tablets running optimally. But it's best not to make changes you're not sure about.
Users of mobile devices often confuse the Android engineering menu with the developer menu, although the vast majority of users know nothing and are not even aware of its existence.
But those who do not chase after new products and do not buy when each one appears new version Android also dream of expanding the capabilities of their device.
To solve the problem, you can go in several ways:
Contents:
How to log in
The most common calling option on an Android device is to enter a combination "*#*#3646633#*#*".
Attention! There are a couple of nuances here:
- firstly, after entering the combination, you do not need to press the call button; a couple of seconds after entering the last asterisk character, the required interface will appear on the smartphone screen;
- The method is applicable to most, but not all devices and firmware versions, especially to Chinese devices;
- appearance and the functions provided on different devices may differ (number of categories, names, differences in versions, etc.).
On other models you should try entering *#*#4636#*#* or *#15963#* . Combinations for mobile devices The most popular manufacturers are shown in the table below.
| Samsung | [*#*#4636#*#*] [*#*#8255#*#*] |
| LG | [*#546368#*818#] |
| Sony | [*#*#7378423#*#*] |
| Huawei | [*#*#2846579#*#*] [*#*#2846579159#*#*] |
| Acer | [*#*#2237332846633#*#*] |
| HTC | [*#*#3424#*#*] [*#*#4636#*#*] [*#*#8255#*#*] |
| Fly Philips Alcatel | [*#*#3646633#*#*] |
If you can't call
It is very rare, but it may be that none of the above combinations resulted in the required window being called. In this case, download the Mobileuncle MTK Tools application (removed from).
It works similarly to the methods described above, with the difference that the commands for entering codes are sent to the mobile operating system automatically, determining its version and gadget model after calling the “Engineer Mode” command.
It is strongly recommended before using the program, it is not for nothing that it has been removed from the application store - many dozens of users have “killed” the firmware of their devices due to inept and careless handling of the software.
In addition to calling options, the program allows you to:
Composition of the extended interface
Engineer Mode for the user is presented in the form of a multi-tab window, where each tab contains certain types of functions.
Telephony
The first tab contains functions to perform general settings phone: testing the network and obtaining information about the network technologies used, changing GPRS parameters, configuring the camera and a lot of sub-items that are incomprehensible to a beginner.
Connectivity
Responsible for changing parameters and displaying information about ports for communication:
You can request comprehensive information about each module, test its operation, change the configuration and look through the logs.
Hardware Testing
The title of the section indicates that there are tools for working with hardware: testing it, extracting any information about hardware components, changing their operating modes.
On Android it supports more than a dozen audio playback modes for various conditions( , call, ).
As for the camera, a huge range of parameters is available here, which includes changing preview videos and specifying the default video frame rate and many other items.
To check stability and through it, you can run a processor stress test.
Changing its voltage and operating frequency in order to overclock or save the battery should be done with extreme caution and awareness possible risks.
The processor has the option to put it into sleep mode when certain conditions, as well as turning off the display.
Engineer Mode also contains a huge number of items for retrieving information and debugging the operation of the processor, touch display, and sensors.
There are functions for stopping and changing the operating mode.
Location
For those who like to use GPS capabilities, who sometimes lack its settings, there is an abundance of items available in this tab.
Log & Debugging
Logs and files with information about modes for battery, memory and big amount settings to exclude unnecessary information from logs and change the directory where they are stored.
Other
The last tab collected everything that had no place in the previous ones. This includes (changing font size, size) and several functions that are inaccessible without root privileges.
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) – at its core hidden application, which developers use to test and set the optimal parameters for 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.
In the dial pad, enter a combination of numbers and symbols to enter the menu
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 - “Starting an engineering MTK 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.
To enter the engineering menu, select Engineer Mode
Shortcut Master utility
The Shortcut Master program is designed to work with shortcuts and system applications: creation, search, deletion. 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.
In the program, call up the additional menu and select Secret code explorer to see a list of codes
Root rights to access the engineering menu
To get to the service menu on some versions of Android, the user must have superuser 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: https://play.google.com/store/apps/details?id=com.farmaapps.filemanager&hl=ru.
- If the application supports installing root rights on your device, then you will see a list on the screen 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.
Instructions for obtaining root access through the Farmaroot application
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
Appearance engineering mode and options for adjusting settings 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.
Sequentially change the maximum volume values for each level
Audio: Increase phone call volume
To enhance the speaker tone for conversations, in the Audio section of the service menu, 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.
By adjusting the speaker volume, you will be able to hear your interlocutor better during a call.
To increase the sensitivity of the microphone, go to the menu Audio - Normal mode - Mic. For each level assign same values microphone sensitivity, for example, 200. Press the SET button, reboot and check whether the other party can hear you better.
Increased microphone sensitivity will allow the other person to hear you better
Video: adjusting sound parameters in the engineering menu
Battery: Disable unused frequencies
Smartphones quickly consume 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.
Disabled frequencies save battery power
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;
- 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.
After setting the settings, do not forget to press the SET button
Service codes for Android devices
In addition to the technical menu, secret USSD codes - 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#*#* | 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 (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 (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.Share with your friends!
Often in Chinese (and probably not only Chinese) phones based on Android, in the engineering menu there are far from optimal settings for the volume of the speaker, headset (headphones) and microphone; we will look at fixing them in this article.
How to get to the engineering menu of an Android phone To get to the engineering menu, open the dialer and enter: *#*#3646633#*#*
special code Also on some Android versions the command might work
*#15963#* and *#*#4636#*#*
If your phone's processor is not MTK, then different options are possible.
*#*#54298#*#* Here are the codes known to me for opening the engineering menu on different phones and tablets: *#*#3646633#*#* or
*#*#8255#*#* – smartphones based on MTK processor *#*#4636#*#* –Samsung smartphones
*#*#3424#*#* Here are the codes known to me for opening the engineering menu on different phones and tablets: *#*#4636#*#* Here are the codes known to me for opening the engineering menu on different phones and tablets: *#*#8255#*#* – HTC smartphones
*#*#7378423#*#* – Sony smartphones
*#*#3646633#*#* – smartphones TEXET, Fly, Alcatel,
*#*#3338613#*#* Here are the codes known to me for opening the engineering menu on different phones and tablets: *#*#13411#*#* — Fly smartphones, Alcatel, Philips
*#*#2846579#*#* Here are the codes known to me for opening the engineering menu on different phones and tablets: *#*#2846579159#*#* – Huawei smartphones
*#*#2237332846633#*#* - devices from Acer
Immediately after entering, the command should disappear and the engineering menu should open. But on some devices you will still need to press the “Call” key
A list of sections of the phone's engineering menu will appear.
Just in case, take a notepad and pen and take note of the settings that were set on your phone before your intervention. You never know, anything can happen.
On my phone (based on an MTK processor), in order to get to the engineering menu I had to install a free utility (program) from Google Play " Mobileuncle MTK Tools“, which opens access to the engineering menu (that is, it works similarly to dialing the magic combination *#*#3646633#*#*).
I'm sure you'll find it there too free apps and for other phones.
Volume settings for the speaker, headset (headphones) and microphone of the phone through the engineering menu
For clarity, let’s briefly look at setting the device’s volume level:
We go into the program or dial the magic combination to enter the engineering menu. Next, in the menu that opens, select the section “ Engineer Mode»
A section will open in which you can select the engineering menu of the Android system (we skip it), and the engineering menu of the phone itself.
We need the phone’s engineering menu, so select the “Engineer Mode (MTK)” section. This point is circled in the figure with a red marker.
A very long menu will open, through which you can get to almost any phone settings. But it’s not enough to get to them, you need to know how to manage them.
Therefore, do not change what you have no idea about.
At worst, write down the parameters that were before your intervention, so that you can return them back later. Let's continue!
Since we are interested in adjusting the sound level, select the “Audio” item, I circled it with a red marker.
And... magic! The menu of interest to us for setting the parameters of the speakers and microphone opens.
Why did we actually go into this menu? Doesn't something work like that out of curiosity? Okay, let's continue to figure it out!
It’s worth stopping here and figuring out what all these menu items mean.
Normal Mode(Settings section in normal or normal mode) – this mode is active when nothing is connected to the smartphone;
Headset Mode(headset mode) – this mode is activated after connecting headphones or external speakers;
Loud Speaker Mode(speaker mode) – it is activated when nothing is connected to the phone or tablet, and you turn on the speakerphone while talking on the phone;
Headset_LoudSpeaker Mode(speaker mode with a headset connected) – this mode is activated if you connect headphones or external speakers to your phone or tablet, and you turn on the speakerphone while talking on the phone;
Speech Enhancement(phone conversation mode) – this mode is activated in the normal mode of telephone conversations, and nothing is connected to it (headset, external speakers) and the speakerphone is not turned on.
Debug Info– it’s not clear why – information on backing up information or debugging it;
Speech Logger– I haven’t fully figured it out, most likely it was logging during negotiations or recording the conversation. If you check the box next to “Enable speech log”, then after completion phone call The corresponding files are created in the root directory of the memory card. Their name and structure are next view: Day of the week_month_year__hour_minutes_seconds (for example, Friday_July_2016__time17_12_53.pcm).
What these files serve and how they can be useful to us is unclear. The /sdcard/VOIP_DebugInfo directory (which is the storage location for files with backup information) is not created automatically; if you create it manually, it will remain empty after the conversation.
Audio logger– used to record sound that supports quick search, playback and saving. 
When you enter any of the modes, you will have access to different volume settings (Type). Here is a list of basic settings you need to know:
- Sip – settings for Internet calls;
- Mic – microphone sensitivity settings;
- Sph – earpiece speaker settings (the one we put on our ears);
- Sph2 – settings for the second speaker (I don’t have one on my phone);
- Sid – skip, if you change these parameters during negotiations on your smartphone or tablet, you can hear yourself instead of your interlocutor;
- Media – adjust the multimedia volume level;
- Ring – adjust the volume level of the incoming call;
- FMR – FM radio volume settings.
Under the settings selection item, a list of volume levels (Level) is available (see figure). 
There are usually 7 such levels, from level 0 to level 6. Each such level corresponds to one “click” on the volume rocker of your smartphone or tablet.
Thus, level 0 is the quietest level, and level 6 is the loudest signal level. Please note that each level can be assigned its own values, which are located in the Value is 0~255 cell. They should not go beyond the range from 0 to 255 (the lower the value, the quieter the volume).
To change this parameter, you need to erase the old value in the cell and write a new one, and then press the “Set” button (the one next to the cell) to assign. 
Finally, at the bottom you can see the Max Vol section. 0~255 (on my smartphone, for example Max Vol. 0~255, it all depends on the manufacturer). At this point it is specified maximum value volume level, it is the same for all levels.
Dear friends. Item names may vary depending on different models. This is an MTK platform, so be prepared to rack your brain and look for a match in your menu. I have a Jiayu G3 phone.
For me the changes were applied immediately, but someone may need to restart the phone for them to take effect.
Although, it seems like you shouldn’t break anything, and if you don’t like the changes, you can always enter the old value..
But still..
YOU MAKE ALL CHANGES AT YOUR OWN RISK!!! Don't forget to turn on your thinking!
P.S.: I found a font size setting on my phone. It turns out you can increase it MORE!
P.P.S.: if something is still not clear, here is a video on setting up sound in the engineering menu:
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) - special application, which 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 a 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.
By at least, 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) - when you finish dialing, the automatic start services. 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, custom firmware may be the cause of the problems. 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. We'll include it here various kinds errors from which no device is immune.
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 discuss 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. Such tools are being developed small companies, so you'll probably have to try a few.
What can be configured in the engineering menu?
Both the appearance of the 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 on different devices, it will not be difficult to understand the items. 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, Chinese smartphones often cannot work out of the box 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 battery life. 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 if it’s not necessary good reason. Here you can find various settings for how your smartphone works with the network, and there is also an option for changing IMEI.
Attention! There were precedents for criminal prosecution for illegally changing IMEI numbers. More often the punishment is a fine or a suspended sentence. However, there were cases of actual imprisonment.
The IMEI change function may come in handy after unsuccessful attempt firmware when the identification number “flies”. 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#*#* | Let's find out MAC address and Wi-Fi data |
| *#*#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 |
| *#*#273283*255*663282*#*#* | Calls backup files |
