How to enter the engineering menu of Android 6.0. Engineering menu of Huawei smartphones

Every Android device has a specific mode called Android Recovery. It is used to restore the correct operation of the phone. In it, you can reset all the settings of your smartphone back to the factory or originally installed ones. In addition, this mode is used to flash the phone's firmware and obtain Root rights. You will learn further in this article how to enter the recovery menu on Android.

The methods for getting into recovery depend on the brand and specific model of your phone. The first thing you should do is rummage through the instructions or search for information about the exact model of your phone on the Internet. Here we will indicate several relatively standard ways to open the recovery menu for different devices. But first you need to do something else.

The first thing is reinsurance. Making a backup

Backup - from the English "back up" - is the common name for the process of backing up data on your phone. Why do this? If something goes wrong and your data disappears, you can still restore it. What could go wrong? Sometimes flashing a phone or opening access to root rights, instead of improving the functioning of the system, on the contrary, “breaks” it. Therefore, if you are interested in how to enter the recovery menu on Android in order to upgrade it in the future, make a backup first.

Most often, this option is hidden in the "General Settings" section. You will most likely see the message "Backup and reset". As you can see, if the phone is working properly, it is not necessary to go to the recovery menu to reset the settings. You can do this during normal operation.

How to enter the recovery menu on Android: basic button combinations

If you need recovery mode because your phone refuses to behave well, then, naturally, we will no longer be able to reset the state through “Settings” to restore the system. Usually, in order to get into recovery, the volume buttons and the power button are used.

The combination depends on the model and brand of your phone. Most likely, you will need to press the following at the same time:

• "Volume Up" and "Power";
• "Volume Down" and "Power";
• "Home" (button at the bottom of the screen) and "Power";
• both volume buttons, “Power” and “Home” (obviously, the creators of Samsung assume very virtuoso finger skills from the owners of their devices).

What is Android Recovery?

After you have entered recovery, most likely you will see the picture shown in the photo.

This is an example of a standard recovery menu preinstalled on the device. Depending on the model, Android version and brand of your smartphone, it may look different. You will navigate through this list using the volume keys, and use the power button as a confirmation button. This list contains the following functions:

Custom recovery menus

If you downloaded a special recovery menu to your phone, then it, unlike the preinstalled or “native” one, will be called custom. The main reason for the existence of alternative recovery menus is the more advanced functionality of custom versions and various additional features, for example, installing unofficial firmware.

The most popular custom menus are Clockwordmod Recovery and Team Win Recovery Project. If the first one is similar in control to a regular recovery menu - using the volume and power buttons, then when the second one is running, the touchscreen remains active. As in the main mode, you control the process by touching the buttons on the screen (see photo below). This is certainly convenient if the screen works without errors. If the “glitch”, because of which you need to go into recovery, is in the screen, difficulties will arise.

USB debugging: how to enter the recovery menu on Android from a computer?

In order for you to be able to enter the recovery menu of your phone from your PC, first take the time to find and download a special program to your computer that makes this possible. But even before that, look for the “USB Debugging” option in the settings of your device - you will find it in the section for developers. Then download AdbRun on your PC. And from there, knowing the commands for the console, you can control some functions of the recovery menu.

Now, if suddenly the recovery menu on Android does not open in the usual way on the phone itself, you can connect the device to the computer using a USB cable and control it from there.

Leaving gracefully: how to leave the menu

If you entered this mode out of curiosity, and now you are worried about how to exit the recovery menu on Android so that it does not lead to irreversible changes to your data, let us dispel your worries.

Most often, exiting is much easier to do than entering the menu. In most well-known recovery menus, this item will even be the first in the list - Reboot System Now. Even if you can’t do this, you can cheat and do what all users usually do first of all if the phone “glitches”: reboot using the power button, remove and reinsert the battery, or in the end just leave the phone to discharge - later it will turn on again in normal operation.

The engineering menu on Android devices is a special “built-in” application into the operating system that allows you to fine-tune the device. This is necessary to debug the operation of the hardware and, of course, the software. But often users want to change some settings at their own discretion. In this case, the question arises of how to enter the Android engineering menu. This can be done using special service codes or third-party software.

What options does the engineering menu have?

Settings and menu design on Android devices may vary depending on the phone manufacturer. In general, users resort to using the engineering menu for the following reasons:

• Setting up audio on the phone (ringer volume, interlocutor’s voice during a conversation);
• Changing camera settings;
• Using recovery mode;
• Setting microphone sensitivity;
• Disabling unused frequencies to save phone battery;
• Obtaining information about the device's MAC address;
• Setting up Bluetooth and Wi-Fi.

The Android engineering menu provides the user with almost limitless possibilities. But you should always remember that only advanced users can use it. Changing some settings may lead to incorrect operation of your smartphone or tablet. If you don't know what each menu item directly does, simply leave it alone.

The developer mode includes setting up Hardware Testing equipment and also contains the following items:

• Audio – adjusts the volume in the phone speakers.
• Camera – allows you to configure various camera parameters (image size, type, etc.).
• Diving current camera shows the current of the camera.
• CPU Stress Test performs a test load on the central processor.
• De-sense is a device manager that manages configuration parameters.
• Display – setting the frequency of the outgoing signal.
• IO – setting up input/output operations.
• Memory – key information about memory.
• Power – information about the battery.
• SD Card Test - testing a memory card.
• TouchScreen – setting up the touch screen, checking sensitivity.
• USB - Tests the operation of the USB port on your phone.

In the Connectivity tab you can get information about devices that work with the outside world. These include Bluetooth, Wi-Fi and FM module. The Log and Debugging tab allows you to view the battery log, set the debugger level and run a special MTK log. In the Others tab you can change fonts, as well as view the temperature of the processor and battery.

How to enter the engineering menu: using code combinations

To enter the engineering menu as quickly and easily as possible, you will need special engineering codes. Each manufacturer has its own combination, which opens access to the engineering menu in Android.

To enter the menu you need to:

In most cases, this technique allows you to open the service menu. Below are some combinations for the most popular phones:

• Models from HTC - *#*#3424#*#*, *#*#4636#*#* or *#*#8255#*#*;
• Samsung devices - *#*#197328640#*#* or *#*#8255#*#*;
• Sony smartphones - *#*#3646633#*#*, *#*#7378423#*#* or *#*#3649547#*#*;
• Huawei phones - *#*#2846579#*#* or *#*#14789632#*#*;
• Mobile from ZTE - *#*#4636#*#*.

There is also a universal code that is suitable for most smartphones and tablets running on an MTK processor. You can look in the specifications of your device to see what processor you have installed. If this is a MediaTek (MTK) product, then try using the combination *#*#54298#*#* or *#*#3646633#*#*.

If it works, you will see the developer menu in front of you. Some engineering codes for Android do not work in operating versions 4.2.1 and 4.2.2.

What third-party applications can be used to enter the engineering menu

How to enter the engineering menu on Android if the Android codes do not work? There is a way. To enter the engineering menu, you will need one of the applications that will allow you to enter developer mode without entering a combination. There are several similar programs in the official Google Play store. One of them is “Launch the MTK engineering menu”.

To use it, you need:

1. Go to the Play Market and enter the name of the program in the search bar.
2. Download and install it.
3. Launch on your phone.

After that, you will see a couple of tabs with different settings.

The application allows you to perform various tests (for example, a processor stress test), obtain information about the modem or memory, and much more. You can also make changes to the hardware. To do this, you just need to open the appropriate sections and configure the settings. In this case, the phone will be on all the time.

An alternative option is the Mobileuncle tools program. You can download it on the Internet. Install the application, and then go to the “Engineer Mode” submenu. Almost all developer menu items will be available in it.

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 new products and do not buy smartphones/tablets with each new version of Android also dream of expanding the capabilities of their device.

To solve the problem, you can go in several ways:

• obtain superuser privileges (root rights);
• install several applications that add new features and provide access to features hidden from the user’s eyes;
• use the developer menu (mainly for comprehensive verification and testing of the device);
• go to the internal system menu (engineering)

We’ll talk about the purpose and capabilities of the latter, having previously found out how you can get into it on various gadgets, firmware and editions of the mobile OS.

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;
• The appearance and functions provided may differ on different devices (number of categories, names, differences in versions, etc.).

On other models you should try entering *#*#4636#*#* or *#15963#* . Combinations for mobile devices from the most popular manufacturers are shown in the table below.

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 the Play Market).

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 model of the gadget after calling the “Engineer Mode” command.

Before using the program, it is strongly recommended to create a backup of the firmware; 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:

• free up permanent and RAM memory;
• restart recovery;
• manage autostart;
• backup, restore and edit IMEI;
• display detailed information about the smartphone hardware.

To gain access to all the features of Mobileuncle MTK Tools, as well as the capabilities of the options, you should acquire root rights for your mobile device.

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 for performing general phone setup: 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:

• Bluetooth;
• Wi-Fi module;
• FM receiver if available.

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 (games, calls, alarms).

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 the stability and performance of the central processor, you can run a processor stress test through it.

Changing its voltage and operating frequency in order to overclock or save the battery should be done with extreme caution and being aware of the possible risks.

The processor has the option of putting it into sleep mode under 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, RAM, and sensors.

There are functions to stop removable flash memory and change the operating mode of the USB port.

Location

For those who like to use GPS capabilities, who sometimes lack its settings, there is an abundance of items available in this tab.

Resetting to original settings

It has never happened to anyone that the thirst for experimentation led to small disasters.

If something goes wrong during use, everything can be returned back, especially if a backup copy of the firmware was made.

Even if you haven’t acquired it, you shouldn’t lose heart, we’ll reset the device to factory settings and that’s it.

1. The first and most reliable way is to roll back the system state to reserved.
2. Resetting the firmware via recovery (BackUp and Wipe).
3. Download Mobile Uncle, call “Restart to Recovery Mode” and click on “BackUp”

The engineering menu is truly an indispensable tool for fine-tuning a smartphone/tablet, allowing you not only to take full control of your gadget, but also, sometimes, to return one of the non-working functions. However, its careless use can lead to problems.

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.

In the dial pad, enter a combination of numbers and symbols to enter the menu

Table: combinations for launching Engineering Mode

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.

To enter the engineering menu, select Engineer Mode

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.

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:

1. Install and run the program. Link to Google Play: https://play.google.com/store/apps/details?id=com.farmaapps.filemanager&hl=ru.
2. 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.
3. Choose one of the preset root methods.
4. The program will begin installation.
5. 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

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 the camera settings and use the 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.

Sequentially change the maximum volume values ​​for each level

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.

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 the same microphone sensitivity values, 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 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.

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;
• 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.

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

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).

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Tune? 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.

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 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.

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 device models. 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) - when you finish 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, 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. 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 discuss below. By the way, on Xiaomi smartphones, which are mostly based on chips from Qualcomm, you can access the engineering data 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, but almost all of them are designed for smartphones based on the MediaTek processor. The MTK Engineering Mode application has proven itself quite well. Hidden Android Settings is an application with similar capabilities. As an example, you can also suggest “Launch MTK Engineering Menu”.

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?

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

Quite an interesting feature of the 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 functions that 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 which bands your mobile operator operates in and 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 unless there is a good reason for it. 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 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, just 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:

1. 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.

1. 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.

1. 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.
2. The “Value is” line specifies the value of each step (volume level);
3. 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, you can use secret codes to access various functions. 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:

Let's take another look at the tablet. We will need this menu whenever there is a need to reflash the device or upgrade Android, for example, to increase functionality.

What exactly is the Recovery menu of the tablet?

Main functionality of the Recovery menu:
- Restoring a previously saved state of the operating system;
- Deleting personal data stored in the system;
- ;
- ;
- Installing updates;

It must be borne in mind that incorrect actions in the Engineering menu can lead to disastrous consequences for the system. It is recommended that before any manipulations in Recover, you save the data from the device in a safe place.
The service menu of each tablet is individual, so before changing anything in it, we strongly recommend that you read the instructions carefully.

Logging into Recovery on an Android tablet

Button combinations to enter Tablet Recovery:
- Simultaneously press one of the volume buttons, Home and the power button.
- Simultaneously pressing one of the volume buttons and the power button.
- Simultaneously hold down the power button and 2 volume buttons.

The buttons are held down until booting into recovery mode.

Recovery of Chinese tablets

Management in the Recovery menu

How to get to Recovery on tablets that do not have volume buttons?

Everyone knows that an advanced user can do wonders with the Windows operating system. But not everyone suspects that Android can offer advanced capabilities. An experienced specialist can call up the engineering menu, in which advanced configuration of the device is carried out, as well as testing of certain of its functions. How to enter the engineering menu on Android - read below.

Modern versions of the operating system have a fairly full section “ Settings" With it you can adjust a variety of parameters. But some of them still cannot be deeply customized. Such parameters should be looked for in the engineering menu. For example, specialists from the service center can enter the engineering menu in order to adjust the volume of the speaker, headphones and built-in microphone.

In a word, the engineering menu contains system settings that should not be available to the average user. The Android engineering menu can easily ruin a smartphone if you change its parameters almost at random. With its help, you can often even change the font size, increase the number of icons on the desktop and make other system changes. On some smartphones, the engineering menu changes the strength of signal reception, the type of vibration and other aspects of the device’s operation.

Interestingly, the easiest way to get to the engineering menu is on Android 4.4 and later versions of this OS. The hardest thing to do is get into such a menu on Android 2.2. Most often, early versions of the operating system were not equipped with an engineering menu at all - which is why they were practically impossible to customize. There are problems with this on the newest devices as well.

The fast and easy way

It should be noted that to open the engineering menu you do not need any third-party program. You don't even need root access! You just need to type a special combination on the virtual keyboard - the so-called engineering menu code. The problem is that many manufacturers use their own code; there is no universal combination. Sometimes the code is different even between different models produced by the same company!

First, you should find the section where you dial a telephone number.

If the engineering menu is not displayed, try pressing the call key after entering the combination.

By the way, owners of devices based on the MediaTek MT6573, MT6577, MT6589 and some others chipset can download the application Launching the MTK Engineering Menu. As you might guess, the utility will allow you to launch the corresponding menu without entering a numeric code.

If you can't enter the menu

It is quite possible that you will try to enter all the above combinations, but will not get into the engineering menu. This happens on Android 6 and some other fairly recent versions of the operating system. Apparently, the engineering menu is locked, or some specific code is required to call it.