Modern smartphones- this is not only the opportunity to make calls, surf the Internet and experience various games. Devices running the Android OS have a fairly large number of different secrets and extensions. Some of them are available in the engineering menu. But what is it? How to login engineering menu? Are there any risks in working with this part of the gadget’s firmware? Let's start with the question of why this menu is not publicly available.

Safety

The fact is that everything that the user has access to, even if mishandled and deleted, will not cause irreparable harm to the smartphone. This same menu, if used incorrectly, can lead to the fact that the gadget is not much different from a simple tin can, which belongs in the trash can.

In addition, everything that the user really needs is always available to the public. Hidden functions are more intended for those who are professionally involved in software repair of smartphones. By the way, many experts recommend taking a piece of paper and a pen before entering the Android engineering menu. For what? Just in case, record all the stock data. This comes in handy when something goes wrong.

What is this menu?

The engineering menu means a special program used by developers at the end of the formation software platform gadget. At the final stage, it helps to change the performance of the device and adjust its various functions at the software level. The same menu is used for testing.

Before using this menu, you should make sure that your smartphone runs on a MediaTek processor. Why is this so important? On other chipsets, for example, Qualcomm, the engineering menu is noticeably truncated and may be completely absent. How to get into engineering Samsung menu, there is no question at all, since all devices of this brand operate on other types of processors.

Android version

Is there a difference between how to enter the engineering menu “Android 5.1” and a younger or old version platforms? Note that there is a difference even in brands and models of gadgets. As mentioned above, for Samsung there is no entry to the engineering menu, although some claim that in this case the following commands work: *#*#8255#*#*, *#0011# or *#*#4636#*#.

How to open the menu

And now we come to the main question: how to enter the engineering menu? This is possible if you enter special code. This can be done through the dialer. What should I enter?

• *#*#3646633#*#*
• *#*#4636#*#*
• *#15963#*

After entering the command, most smartphones are automatically redirected to the engineering menu. In rare cases, you need to press the call button. If nothing happens after this, check that your input is correct. If there is no error, but no result, then the entered code does not suit you.

If you have a tablet that does not have a dialer, or none of the codes worked, you can download a special application from the Market. For example, MTK Engineering or MobileUncle Tools. The apps are free.

Functional

After you have succeeded in entering the engineering menu, you need to find the department for which all the procedures described above were performed. There are three options to test and determine any indicators. Let's figure out what's what.

Camera

Let's start, perhaps, with this part of the gadget. Through the engineering menu you can configure almost all camera parameters. In another mode, you can turn it on to determine operating current indicators. Few people are interested in this, but in some cases it helps solve certain problems related to auto-correction or focusing.

Audio

Often the question of how to enter the phone’s engineering menu interests the user precisely because he wants to make his gadget louder. If the manufacturer has not set the maximum settings, you can independently adjust the sound in both the speakers and microphone.

These operations can be carried out in several separate modes:

• Sip. This item is designed to set up calls via the Internet according to parameters convenient for you.
• Mic. In this section, you can change the sensitivity of the microphone in any direction, for example, make it so that the microphone does not pick up breathing, and so on.
• Sph. This section is responsible for the auditory speaker. It is recommended to use it if you have difficulty hearing interlocutors calling from different devices, and adjusting the volume rocker doesn't help.
• Sph2. This function cannot be used in every smartphone, since it is intended for the second hearing speaker.
• Sid. It is better not to change this parameter, since it is almost impossible to configure it correctly again. It is responsible for the echo effect.
• Media. Use this section if you are not satisfied with the multimedia volume level. Here we are talking about music, video and so on.
• Ring. The name of this parameter speaks for itself - ringtone or volume of an incoming call.
• FMR - radio sound setting.

When working in each of the sections, you should understand that you should not play with each of the parameters.

Connections

In the connections section, you can test and adjust all possible types of connections that are in the gadget. These include Bluetooth and Wi-Fi. Besides these obvious types wireless connection, you can check how well and stable the WLAN CTIA and even the FM receiver work.

Interestingly, in a separate section “Disable detection” you can adjust the signal frequency.

Display and touch screen

These sections will help you test and configure your smartphone screen and backlight. The first is responsible for correcting the backlight, controlling the display lines and adjusting the backlight. When setting up the sensor, you can test it for broken segments, response to touch, and so on. You can also calibrate the sensor through the engineering menu.

Memory and USB

The question of how to enter the engineering menu is also asked by those who are faced with the disappearance of memory on the device. By the way, in a separate section you can test the SD card. As for the gadget’s memory, the menu contains all the information about the module. In the engineering menu you can test the functionality of the USB port.

Battery

Quite a lot of people search for this section and get upset when they don’t find it. Maybe it's not in the engineering menu? In fact, you can see the condition of the battery, the percentage of its wear and the rating of the processes that most affect the device in the “In Degree” section and in the “Battery Log”. The reason for such a strange name is an incorrect translation from English. By the way, there is simply no transition from Russian to any other language in the engineering menu.

Qualcomm

As mentioned above, in most devices with such a processor, the engineering menu does not work or is significantly reduced. You can get into it through the regular menu. In it you need to click on the item called “Kernel Version” several times in a row. it will be revealed to you new feature, which contains five separate items. Which ones?

1. Automatic Test. Fully consistent with its name, it carries out automatic testing of all necessary systems.
2. Single Item Test. This section allows you to choose one of 25 tests.
3. Test Report. Clicking on this option will allow you to view test reports.
4. SW add HW version consists of various numbers that display the smartphone data.
5. Device View. Here you can find information about the equipment.

Not all Qualcomm smartphones will display exactly this menu, but it’s worth a try.

conclusions

Knowing how to enter the engineering menu of “Android 4.4” and other versions of this operating system, you should understand that if one of the settings causes the gadget to malfunction, the ability to restore it becomes very small. Therefore, as soon as you decide to change anything in the settings through the engineering menu, be aware that this could end the life of the device. If you are not satisfied with something in the operation of the gadget, it is better to contact an experienced technician and describe your wishes in detail. He will be able to soberly assess the possibilities and make a verdict.

In order for developers and testers software And mobile devices could obtain some system information and debug smartphone functions, Android OS contains some hidden possibilities. Among them are connecting to a PC in developer mode, viewing detailed information about networks and hardware, etc. One of the tools for this is the engineering menu.

The engineering menu is special menu settings, which contains tools for testing and calibrating smartphone hardware. By default it is hidden, and in order to get into it, you must perform a certain procedure. Appearance The engineering menu differs on different smartphones, depending on the manufacturer and SoC model. The customization options will also be different.

There are several ways to enter the engineering menu, which differ depending on the smartphone manufacturer and chipset model. You can first try entering one of the codes in the dialer application:

• *#*#3646633#*#* - smartphones with
• *#*#6484#*#* - some smartphones with Qualcomm;
• *#*#54298#*#* - some smartphones with MediaTek;
• *#0*# - some Samsung smartphones;
• *#*#7378423#*#* - some Sony smartphones;
• *#*#4636#*#* - on some devices opens only the network menu;
• *#*#2846579#*#* - some Huawei devices.

If none of the codes help, on your smartphone with MediaTek you should install the program “Launch MTK Engineering Menu” from the market. On Xiaomi devices, you can enter the menu by going to “Settings”, selecting “About phone” and then clicking the “Kernel version” line five times in a row.

What can be configured on a smartphone in the engineering menu

The engineering menu differs on different platforms; in many cases, it only allows you to test some parameters. On Xiaomi Redmi Note 3 Pro and Note 4X, built on Qualcomm chips, the engineering menu allows you to test various functions. These include the screen, sensor, sensors, cameras, sound and microphone, communications, battery, navigation, etc. There is no way to change anything, you can only find out if everything is working correctly.

There are much richer opportunities on the MediaTek platform. In Oukitel U7 Plus (MT6737 chipset), the engineering menu allows you to configure network, sound, communication modules, and other modules. On Redmi Note 2 with MTK Helio X10, the menu was identical, and on other devices with MTK it is not particularly different. We will use his example to describe the possibilities.

Telephony tab

This section is responsible for configuring the modem cellular communications. Here, interesting possibilities are provided by the BandMode, Network Selecting and GPRS options.

BandMode

In this menu you can select communication standards that will be active on the phone when connecting to mobile networks. In the menu item, you can select frequency ranges for each SIM card, if there are two SIM cards - full list usually available only on the main page (usually the first one). Once you know exactly which frequencies your operator uses in the region, you can uncheck all the others. This will increase the time slightly battery life due to the fact that the device will not search for operator towers in these ranges, wasting extra energy on scanning the airwaves.

Sometimes some communication standards (especially LTE) are supported at the chipset and core level, but are disabled in the firmware. By checking the box next to them, you can activate support for these networks. It is worth warning that it does not work everywhere: on the same Redmi Note 2 ( Chinese version) this way TDD-LTE was enabled, but on Oukitel U7 Plus these items are not activated.

Network Selecting

The name speaks for itself: this item is also responsible for selecting networks. Only in this case the user can choose which types of networks to use. The goal is the same as in the previous paragraph: to reduce the load on the cellular modem, thereby reducing battery consumption. You can choose to work only in 2G, 3G, 4G, or combine several standards.

If your operator does not have 3G or 4G at all, these items can be disabled so that the smartphone does not constantly try to search for LTE networks, thereby speeding up battery drain. You can also disable 3G and 4G if you need constant communication (for example, for correspondence over the Internet), but traffic is limited and uncontrolled use of WCDMA and LTE by background processes can quickly waste it.

GPRS

Despite the name, this item is not interesting because of the GPRS communication settings, which many people no longer need, and it is not recommended for “mere mortals” to change the settings themselves. main feature– this is an opportunity to record the IMEI of a smartphone. In the appropriate item, you can enter the device identification number and click Write to save it.

The ability to write IMEI is often required after an unsuccessful flashing, when it “flies” and the device cannot register in the operator’s network. By copying this code from the smartphone box, you can restore functionality. Attention! illegally changing the IMEI of a smartphone in many countries (including Russia, Ukraine) is a crime! In addition, by rewriting this code to a random one belonging to another subscriber of your operator, communication problems may occur due to a hardware conflict. Therefore, we recommend that you always keep the box or sticker with IMEI in case of unsuccessful firmware. After all, on devices with a non-removable cover, this identifier is not written under the battery.

Connectivity tab

In this tab, functions for testing and fine-tuning the Bluetooth module, radio receiver and Wi-Fi are available. The vast majority of users have nothing to do here, since there are no settings interesting for a layman, but it’s easy to disrupt the normal operation of Bluetooth by entering something wrong.

Hardware Testing Tab

This settings item in the engineering menu is responsible for configuration hardware. The Audio and TouchScreen items are of interest to users. The latter contains HandWriting and MultiTouch items. It’s easy to guess what these parameters are responsible for.

Using the first one, you can check the clarity of the touchscreen response and check for the presence of “blind spots”. This menu is especially useful when purchasing a smartphone, in particular, without a warranty. The second point allows you to do the same, but with the participation of several fingers. With it you can test how well the smartphone processes gestures of several fingers simultaneously.

Audio

It is this treasured item that is needed by those who are looking for how to increase the volume in the engineering menu. The top items allow you to control the volume of the device and are responsible for different modes.

Normal Mode is a mode for normal use, with music or video sounds output to the music speaker. Headset Mode is responsible for controlling the volume in the headphones. LoudSpeaker mode allows you to adjust the conversation volume when using the speakerphone. The last item is a combined one; it is responsible for speakerphone when headphones are connected. In order to change the sound in the engineering menu, you need to select which device you want to configure.

• Sip - settings for Internet telephony;
• Mic - microphone sensitivity
• Sph - conversational speaker;
• Sph2 - second earpiece (a rare beast among smartphones);
• Sid - after changing this parameter, an echo of your voice may appear during a conversation, so you do not need to touch it;
• Media - a multimedia speaker, what most people need.

In order to adjust the volume, you need to go to the required mode (for the volume of a multimedia speaker this is Normal Mode), select the Media item and set the volume value in the specified range.

The Level parameter is responsible for the volume value set by the rocker at each division. Level 0 is the minimum value (one division), the highest Level is all divisions, on Oukitel U7 Plus it is 14, on other smartphones it may differ. The value can range from 0 (speaker silent) to 255 (full volume). There is no particular point in changing the value, but if after a certain division it seems to you that the sound suddenly becomes much quieter, you can increase the values ​​​​for this division (and lower levels) by a couple of units. The main thing is that the conditional Level 6 does not turn out to be louder than Level 7 due to the value being too high.

But to increase the maximum volume in general, you need to change the value in the Max Vol item. The maximum level corresponds to a value of 160, but manufacturers often set it lower (on the tested device it was 128). By setting the number higher, the volume will increase, but there may also be side effects such as gurgling, noises and wheezing. The optimal value should be selected using the scientific method: increase the value by several units, save, check the sound on video or music, and if everything is fine, increase it further.

Conclusion

It’s worth repeating once again that the engineering menu is different on different smartphones. What is available on the MediaTek platform cannot be done on Qualcomm. Codes for entering hidden settings may also not be suitable in some cases; we cannot guarantee their 100% functionality. In addition, everything you do with your smartphone is done at your own peril and risk, since incorrect settings can affect its performance. In such cases, only a general reset or flashing will help. So if you really want to experiment with settings whose meaning you don’t fully understand, it’s advisable to take screenshots before doing so, so that if something happens, you can enter the factory values.

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Surely not many users of Android OS devices know that there are so-called engineering (service) codes, which, by the way, appeared much earlier than the release of the first version of the Android OS. This set of special characters was called by the developers the “Engineering Menu”, which is recommended to be manipulated only by specialists, but, nevertheless, ordinary users This kind of information will clearly be of interest and probably useful.

The main purpose of this system is for specialists to work with it service centers for repair and fine-tuning of mobile devices. Therefore, after reading this material, and having learned the combination of symbols for entering this or that block of the engineering menu, you decide to experiment with your own device, without sufficient knowledge and training, you must be aware that all responsibility for the consequences will lie only with you.

What can be changed in the engineering menu

Now we will tell you what can be done using this or that engineering code:

Engineering menu codes and their functions:

• Find out the IMEI identifier - *#06#
• Settings and details - *#*#4636#*#*
• Android firmware, version - *#2222#
• Delete all SMS - #*5376#
• Getting information about the phone (usage statistics) and battery - *#*#4636#*#*
• Reset account Google account of the phone owner and others system utilities without removing pre-installed software while saving programs located on the memory card (SD) - *#*#7780#*#* (before resetting the settings, you will be asked to confirm the action being performed, so there is still a chance to change your mind).
• Performing a factory format - deleting absolutely all settings and files, including those stored in internal memory, and reinstalling the smartphone firmware - *2767*3855# (Entering the code does not give you a chance to think twice; only quick removal of the battery and data recovery via PC is possible)
• Camera Information - *#*#34971539#*#* Here you can work on the following parameters:

— updating the phone camera firmware into the image,

— Receipt firmware versions,

- information about quantity firmware updates,

— updating the camera firmware on the SD card.

Important! You should NEVER use the first option yourself to avoid complete failure of the camera.

• Changing the End End button modes (On/Off) — *#*#7594#*#* By default, a long press of the button shows on the screen options for switching to silent mode, flight mode, or turning off the smartphone. Here you can do automatic shutdown phone without choosing options.
• Opening the file copy screen - *#*#273283*255*663 282*#*#* Here you can obtain backup copies of your own data (photos, audio, etc.).
• Entering maintenance mode (running various tests (by pressing the “menu” button), changing settings in service mode) — *#*#197328640#*#*

Factory test codes:

• Wi-Fi MAC address - *#*#232338#*#*
• WLAN - *#*#232339#*#*
• GPS test - *#*#1472365#*#* or *#*#1575#*#*
• Bluetooth *#*#232331#*#*
• Bluetooth address - *#*#232337#*#
• Loopback Batch Tests - *#*#0283#*#*
• Touch Screen Version - *#*#2663#*#* (test *#*#2664#*#* )
• Motion sensor test - *#*#0588#*#*
• LCD test - *#*#0*#*#*
• Vibration and backlight - *#*#0842#*#*
• Melody test - *#*#0673#*#*
• RAM version - *#*#3264#*#*

We have provided information only about basic codes for Android that solve some problems in the operation of the device and therefore may be of interest to advanced users. But, nevertheless, let us remind you once again: DO NOT enter any codes if you do not know what they are for!

To enter the Engineering Menu you need instead telephone number Enter into the dialer a certain combination of characters, different for different manufacturers:

• For Samsung - *#*#8255#*#* or *#*#4636#*#*
• Smartphones based on MTK processors - *#*#3646633#*#* (Maybe *#*#54298#*#* )
• "HTC" - *#*#8255#*#* or *#*#3424#*#*
• "Sony" - *#*#7378423#*#*
• Huawei - *#*#2846579159#*#* or *#*#2846579#*#*
• Fly, Philips, Alcatel - *#*#3646633#*#*

Immediately after entering, the engineering menu should open. If it doesn't work, you can try pressing the button that makes the call.

To launch the engineering menu on smartphones with an MTK processor, there is a special application that can be used if the service does not open through the dialer.

In fact, as can be seen from the material, the service menu opens up enormous opportunities for setting up or troubleshooting problems in the device, but amateurs should still not use it in order to avoid “bricking” their “Andryukha”. Take this note into account if your little hands are itching to urgently enter the treasured code.

Why do you need rooting? Android devices and what opportunities it provides are known to a fairly large number of users, which cannot be said about the hidden advanced hardware settings menu, also called the engineering menu. Few people know about these settings, and even fewer mobile device owners know how to use them. What is the Android engineering menu and why is it needed?

Engineering Android menu is nothing more than a special subroutine designed for testing by developers of the operating system and device sensors. The interface of this program is represented by a set of options that allow you to change the hardware configuration of your mobile device. With its help, you can get comprehensive information about the hardware of the gadget, test the processor, RAM and physical flash memory, modes wireless connection, configure camera settings, display, microphone, speakers and much more.

Entering the engineering menu

All this, of course, is good, but how do you go to the engineering menu if there is no corresponding option in the Android interface? You can enter the advanced hardware settings menu using a special code entered in the phone number dialing line. The menu should open immediately after entering the last character of the combination, but in some cases you may need to press the call button.

There is nothing complicated in the procedure itself, however, it should be taken into account that different models of mobile gadgets have their own codes. Below we have provided a list of codes for the most popular manufacturers.

Engineering menu codes in Android are universal, however, their correct operation on phones with “left” firmware is not guaranteed. To access hardware Android settings can also be used special programs, For example, "MTK Engineering Menu" or "Mobileuncle MTK Tools".

Such applications are especially useful on tablets whose firmware does not provide a dialer. Interface and set available options These programs are somewhat different, however, understanding them will not be difficult.

Whatever method you use, you need to exercise maximum caution when working with the engineering menu. Before starting work, it is strongly recommended that you write down all the initial parameter values ​​so that you can restore the settings. It is unacceptable to experiment with the engineering menu just to find out what comes out of it, as you can render your device unusable!

To obtain a list of engineering codes for specific model phone can be used special application Secret Codes, available in Google Play. On some mobile device models, full access to the engineering menu may require superuser rights (root).

What you can change using the menu

You know how to get to the engineering menu, now let's find out what settings can be made using it. The possibilities are more than wide. The menu subroutine supports changing the speaker volume level and microphone sensitivity, built-in camera settings, audio parameters, GPS modules, Bluetooth and Wi-Fi, turning off unused frequencies to save battery power. You can also test the key components of your device and external card memory, configure I/O operations, determine the exact temperature of the processor and battery, and the level of harmful electromagnetic radiation.

Another useful function is to gain access to recovery mode - an analogue of BIOS on computers, which in turn contains a whole set of settings. Recovery mode features include resetting the device to factory settings, updating the firmware, creating a backup copy of the operating system, gaining root access, and deleting sensitive user data. It is not possible to list all the engineering menu options in one article; the more sensors and components a phone or tablet has, the more extensive it will be.

Increasing phone volume through the engineering menu

Now let’s demonstrate how to work with hardware settings using the example of one of the most popular operations and learn how to increase the volume on Android through the engineering menu. So, go to the menu using Mobileuncle MTK Tools or by entering the “magic” code, then find and open the Audio subsection. If you entered the menu through the Mobileuncle Tools program, this subsection will be located in the senior section Engineer Mode, in other cases it is usually located on the Hardware Testing tab.

In the Audio subsection you will have the following options:

• Normal Mode normal mode, which works when a headset is not connected to the device.
• Headset Mode – headset mode that turns on when headphones or speakers are connected to the smartphone.
• LoudSpeaker Mode – loudspeaker mode. Activated when the speakerphone is turned on, provided that a headset is not connected to the device.
• Headset_LoudSpeaker Mode – loudspeaker mode with a connected headset. The same as the previous one, but with headphones or speakers connected.
• Speech Enhancement - this mode is activated when talking on the phone without using the speakerphone.

There may be other settings in the section, for example, Debug Info and Speech Logger, but it is better not to touch them. Select the mode for which you want to change the volume level (let it be Normal Mode), select Type in the list that opens and indicate for which function we will change the volume. The following functions may be available:

• Ring – adjust the volume for incoming calls;
• Media – adjust the speaker volume when playing multimedia;
• Sip – sound settings for Internet calls;
• Sph – sound settings of the conversational speaker;
• Sph2 – sound settings of the second speaker (the option may not be available);
• Mic – change the microphone sensitivity;
• FMR – FM radio volume settings;
• Sid – it is better not to touch this parameter, otherwise problems with the interlocutor’s voice may occur.

Having selected a function, scroll through the current list, set the desired Value (from 0 to 255) and click to apply the new Set settings.

To change the volume level, you can also use preset templates - the Level option. Most phones have seven levels, from 0 to 6. It is advisable not to touch the Max Vol setting, just as you should not set the Value values ​​too high, otherwise the sound in the speakers will begin to wheeze. Other modes in the Audio subsection are configured in a similar way.

Some smartphone and tablet models require a reboot for the new settings to take effect.

Reset

And the last thing we will look at today is resetting the engineering menu parameters to factory values. It may be needed if, after making changes, the device begins to work incorrectly. There are several reset methods. If the system boots normally, go to the settings and open the “Backup and Reset” subsection.

You can also reset the engineering menu by entering a special service code. Usually it is *2767*3855#, *#*#7780#*#* or *#*#7378423#*#*, but your phone model may require a different code.

Another option is to use the recovery mode mentioned above. To get into it, use one of these combinations:

• Power button + volume down.
• Power button + volume up.
• Power button + Home button + Volume down/up.
• Power button + volume up + volume down.

In the list of options that opens, select “wipe data/factory reset” → “Yes – delete all user data” → “reboot system now”. The device will reboot and the settings will be reset.

There is another way to reset the engineering menu settings, but it requires superuser rights. Using any file manager that supports root rights, go to the root directory of the system, and then delete all or part of the contents of the folder data/nvram/apcfg/aprdcl and reboot.

Files in a folder aprdcl they are responsible for setting up the engineering menu. It is not necessary to delete all files at once. If you mess up, say, your audio settings, all you need to do to restore the original settings is delete files that have an audio string element in their names. And one moment. Regardless of the reset method, always do backup copy your personal data and applications, as they may all be lost.

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

Hidden capabilities of the system

At the last stages of setting up a smartphone, developers test the system for errors and check the operation of all sensors on the device. Especially for this, Android has a special subroutine built into it - the engineering menu, which provides access to hidden settings of the Android OS and allows you to reconfigure them yourself. In addition, the menu contains detailed information about the device. The full list of menu options is known only to the platform developers, so you should make your changes with caution.

Secret paths of developers

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

Enter a special code to enter the engineering menu

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

Enter the menu subsection

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

If it doesn't work out the first time

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

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

List of special codes

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

Table: code options for different Android models

DIY engineering menu

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

The first option is Mobileuncle MTK Tools. In this program, in addition to required set There are several settings additional functions: firmware update, recovery update, GPS receiver enhancement mode and much more.

Mobileuncle MTK Tools provides a set of settings

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

MTK Engineering Mode repeats the standard engineering menu

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

Where to begin

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

Engineering menu settings

Settings open up enormous possibilities for users.

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

In this section you can configure settings mobile communications.

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

Photo gallery: mobile communication parameters

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

Wireless interfaces

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

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

Photo gallery: wireless data transmission

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

1. Audio- fine tuning sound playback settings.
2. Camera - a set of parameters for taking photos and videos that are not included in the Camera application.
3. Driving Current Camera - takes current readings from the sensor in the camera circuit.
4. CPU Stress Test - performing tests of all subsystems central processor.
5. Deep Idle Setting - disable sleep mode in standby mode.
6. Sleep Mode Setting - sleep mode settings.
7. ChargeBattery - View battery information.
8. Sensor - sensor calibration.
9. Multi-Touch - checks the number of available points for simultaneously pressing the screen.
10. Location Engineer Mode - checking the parameters of the GPS module.

Photo gallery: equipment testing

Go to the section for checking electronic components Adjust the volume of the conversation speakers Adjust the camera's power supply Adjust the standby mode Adjust the frequency of the central processor Adjust the sleep mode View information about the battery Configure touch screen Checking the capabilities of the multi-touch function Setting up the GPS module

Adjusting the speaker volume

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

You should be careful when changing volume settings. All parameters are individual for a specific device model. Incorrect configuration may result in poor hearing performance.

There are a number of general parameters:

1. MaxVol - general volume level. The range of values ​​is from 0 to 160. The higher the number, the higher the volume.
2. Sph - volume during a telephone conversation.
3. Mic - microphone sensitivity.
4. Ring - speaker volume for incoming calls.
5. Media - volume level when watching movies, listening to music and playing games.

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

ROOT is a panacea for a smartphone

On a smartphone without root rights functionality The engineering menu is limited: some items are not displayed, changes made are not saved. Any interference with the operation of a smartphone requires open access to the system. Don't forget that gaining root access can damage your gadget and will void the device's warranty. We strongly recommend doing backup important information to a memory card and synchronize with your Google account and remove it to avoid data loss. To unlock full access to the system, you can use one of the existing methods.

Installing the application directly on the device (KingRoot)

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

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

Obtaining superuser rights via PC (Kingo Root)

This method is slightly different big amount preparatory activities:

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