Recovery have 4pda. Is it possible to remove IMEI? Devices based on MTK processor

Those who use smartphones based on Chinese MediaTek processors know very well what an incorrect IMEI is. What to do if IMEI on Android is lost? Most often this happens after flashing the firmware or general reset of the smartphone. Don't worry, most of these errors can be corrected.

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Restoring IMEI on Android will not take much time if you backup NVRAM and NVDATA from your device in advance.

Where is IMEI stored on Android?

To make a backup of IMEI you need to know where it is stored. On devices with MediaTek processors (90% of Chinese smartphones and 50% of budget devices from well-known manufacturers), the IMEI is stored in NVRAM. In addition to IMEI, it stores data about the calibration of wireless modules, identification information (IMEI, MAC), as well as settings for some equipment.

The device’s firmware provides a separate memory area called NVRAM; during the first startup of the smartphone, information from there is copied to the /data/nvram directory. After this, the data in this directory may change for various reasons, including problems with the firmware.

How can NVRAM be damaged?

• Formatting a smartphone using SP Flash Tool
• Using the wrong version of SP Flash Tool
• Memory re-partitioning
• Partial firmware
• Interrupted smartphone firmware process

Signs of damaged NVRAM, or how to find out that IMEI has been lost

• When you enter *#06# in the dialer, empty fields appear under IMEI 1 and IMEI 2
• When Wi-Fi is turned on, the virtual network “Nvram warning err = 0x10” appears

Backup IMEI on Android using SP Flash Tool

To make an IMEI backup, the first thing you need to do is charge your smartphone to at least 40%. Next, you need to install drivers for your device, as well as the SP Flash Tool. Next in order:

1. Click Scatter-loading and select the scatter file from the official firmware for your device
2. Switch to the Readback tab
3. Click the Add button, a new line will appear below. Double-click on the new line and enter the name of the file to save. Specify the folder where the IMEI firmware will be saved and name it nvram.img, click save.
4. The Readback block start address window will appear. In Region you need to select EMMC_User (MT6592 and higher). In a text editor, open the scatter file from your firmware and find the NVRAM item, it looks something like this
5. Copy linear_start_addr and partition_size values ​​into SP Flash Tool to Start Address and Length respectively
6. Recheck the entered data and click Read Back
7. Turn off the smartphone, remove and reinsert the battery, if this is not possible, then wait 1 minute after turning off. Connect the switched off smartphone to the PC with a working cable, the program will pick up the smartphone and after a few seconds a small window with a green checkmark will appear, which means everything is correct.
8. Disconnect your smartphone from your PC and check the saved file along the path you specified in step 3.

For smartphones with MT67xx series processors, you additionally need to save NVDATA. Do everything the same as in the instructions above, starting from point 3.

Repairing IMEI after flashing using SP Flash Tool

1. In SP Flash Tool, specify your Scatter file and press “CTRL+ALT+V”
2. In the top menu of the program, select the item Window – Write Memory
3. Switches to the Write Memory tab
4. Fill in the File Path item by clicking on the folder icon and selecting your NVRAM backup
5. In the Region item, select EMMC_USER (for MT6592 and higher)
6. Open your Scatter in a text editor and copy linear_start_addr into the Begin Address (HEX) line
7. Click Write Memory
8. Connect the switched off smartphone to the computer using a standard cable. The program will see the smartphone and write down the specified memory area, that is, it will eliminate the incorrect IMEI.

For MT67xx smartphones, you need to do the same for NVDATA.

After this, you need to flash the device with full factory firmware in accordance with the instructions for your smartphone. After flashing the firmware, you need to turn on the phone and reset it through the settings. Sometimes you need to flash the full firmware in Firmware Upgrade mode.

This IMEI firmware should always be stored on a computer or cloud service, the main thing is that you always have access to it, it is much easier than correcting an incorrect IMEI manually.

Restoring IMEI through the engineering menu

The main advantage of this method is that you do not need root rights or any additional programs, everything is done directly on the phone. So, to change IMEI through the engineering menu, you will need the IMEI itself, which can be found on the smartphone box or under the phone cover.

How to change IMEI through the engineering menu:

1. Open your phone and enter *#*#3646633#*#* (the combination may vary for your device)
2. The engineering menu has opened, open the Connectivity tab
3. Go to CDC Information - Radio Information
4. There are 2 items in this submenu: Phone 1 and Phone 2, these are the first and second slots for SIM cards, open Phone 1
5. In the line where “AT+” enter the letter “E” in English and click on AT+EGMR=1.7,”IMEI” (instead of IMEI you need to enter your first IMEI) and click Send AT Command. After this, a message with the phrase Ok should appear, which means the IMEI is in place.
   

   IMPORTANT! After AT+ you need to put a space!

6. Do the same operations with Phone 2, only here you need to select AT+EGMR=1.10,"IMEI". Don't forget the space after AT+.
7. Reboot your smartphone and check the IMEI using *#06#.

Ready! You changed IMEI through the engineering menu. I strongly recommend that you enter the exact IMEI that was on the phone, otherwise there may be problems with mobile communications.

Repair IMEI with MAUI META

This method requires a PC. You will need the MAUI META program. installed drivers(full package and CDC driver) and a newly flashed phone (preferably). You will also need the file "BPLGUInfoCustomAppSrcP****" from installed firmware.

Main difficulty IMEI repair via MAUI META is correct connection devices in META Mode, one of the ways:

1. Install and launch MAUI META
2. Click Reconnect, the indicator in the program will start flashing
3. Turn off your phone, press Volume Up and connect to PC
4. The MTK device will appear in the Device Manager under “Ports” USB Port
5. Disconnect the device from the PC, disconnect and connect the battery, click Reconnect in the program and connect again with Volume Up, MTK USB Port will appear again and the program will give an error, click Disconnect
6. Enable the option “Connect smartphone in META mode” and click Reconnect
7. Connect the device without pressing any buttons
8. The blinking indicator turns yellow, which means the smartphone is connected, you can restore IMEI!

For all devices, META login methods Mode different! Write in the comment “I can’t connect to MAUI META, my Lenovo device A5000" indicating your device model!

If after successful connection a program window pops up, close it, click Action - Open NVRAM database and select the file “BPLGUInfoCustomAppSrcP****” from the installed firmware. Following are the instructions:

1. Select IMEI download from the dropdown menu
2. The IMEI editing window appears, click Change NVRAM Database file and select the file from the firmware again
3. Enter IMEI without last digit in the IMEI field and click Download to Flash, do the same with second IMEI if there is
4. Close the window, click Disconnect and restart your smartphone
5. Check IMEI with *#06#

More clearly in the video.

How did you recover IMEI after the firmware? If you have any problems, write in the comments and they will definitely help you.

Answers to frequently asked questions

Error "this command is not allowed in userbuild"

This error occurs if you did not put a space after “AT+”, just add a space and the IMEI will be restored.

Any smartphone or tablet Android based has unique identifier radio module (IMEI), consisting of 15 digits, which can be checked in several ways. But sometimes the IMEI may go missing, and there may also be a need to replace or restore it.

What is IMEI and how to find it on Android devices

IMEI - individual number of the radio module that is included in each Android device or other operating system. IMEI is needed to authorize devices in the operator’s mobile network. Without it, the user will not be able to make and receive calls, as well as SMS messages. If the gadget uses two SIM cards at once, then two IMEI codes will be displayed at once.

You can find out the IMEI of your device in several ways:

• dial the combination *#06# in the dialing menu;
• go to the settings menu of your smartphone or tablet in the information section “About the device”;
• find information on the back cover of the gadget, SIM card tray or on the device box.

After which a 15-digit code will be displayed on the screen - this is the IMEI.

How to restore IMEI if it is missing or lost

IN in rare cases A system window may appear on the device screen with the message “Invalid IMEI”, which is why the smartphone is not authorized in the mobile operator’s network. If this error occurs, the user cannot work with the network, that is, make calls, receive calls and use the mobile Internet.

Error incorrect IMEI can be solved by restoring it using programs or the engineering menu

There may be several reasons for the appearance of error information about the loss of the IMEI identifier or the display of an empty window when checking using a USSD request. For example, due to an unsuccessful attempt to flash the gadget or hard-reset (reset to factory settings). It is worth noting that if problems arise with IMEI, all functions of the device are fully functional, in addition to those related to the radio module (network coverage).

If it suddenly happens that your device does not display the IMEI when prompted, there are several ways to restore it.

Repairing IMEI using the engineering menu

To call the engineering menu (Engineer Mode), you need to use a special combination, which may differ depending on different devices. You can find out which combination will help you call up the engineering menu from the instructions or documentation that comes with the device.

If for some reason the documentation is lost or is not nearby, try using the code *#3646633#. If it doesn't work, you can try to select a code from the options for different manufacturers.

Table: IMEI call commands for various smartphone models

After the engineering menu has been called up, you need to do the following:

Video: how to restore IMEI after unsuccessful firmware using Engineer Mode

How to repair IMEI using IMEI&SN Writer app

One of the frequently used IMEI repair applications is IMEI&SN Writer. Since this program is very easy to use and does not require root rights, every user can use it to restore the IMEI of their device. For recovery IMEI ID You will need Android device drivers, database files of the type of processor used by the gadget, and an IMEI&SN Writer.

1. Install device drivers on PC. Next, run the utility, select SMART PHONE in the PlatForm field, USB under it, fill in the IMEI_1 and IMEI_2 fields. Click the Select DB button.

   

   In the IMEI&SN Writer program that opens, select required characteristics, click Select DB

2. In the window that appears, first select the modem part database file. Typically it starts with the characters BPLGU.

   

   Select the device database file that starts with BPLGU

3. Then open the processor part file. In most cases, its name begins with APDB.

   

   Open the processor part file starting with APDB

4. In the main window, click Start to begin the recovery.

   

   The last step of IMEI repair using IMEI&SN Writer application is to press the START button

5. After completing these steps, connect your Android device to your computer and wait until the recovery procedure is completed and the IMEI recording success message appears.
6. Turn on your smartphone or tablet, enter the USSD request *#06# and make sure that the IMEI is displayed.

If the user does not have the original factory firmware and is unable to find it, he should try using the firmware of a gadget with a similar processor model.

Video: IMEI repair using IMEI&SN Writer

Changing IMEI using applications

Reasons for IMEI replacement there can be several, for example if you want:

• disable device tracking;
• change the invalid IMEI code to a new one;
• reset the settings to factory defaults or update the device.

For change IMEI identifier can be used special programs, but most of them require root access. These rights allow you to change system settings Android devices up to deletion system applications. Initially, the user does not have root rights and must be obtained. But it should be noted that upon receipt of them, the manufacturer’s warranty of the gadget used becomes invalid, so choosing this method is recommended only for experienced users.

Device Id IMEI Changer Xposed

By using Device applications Id IMEI Changer Xposed you can not only change IMEI, but also ID, MAC address and Network SSID. On Google Play Market available both paid and free version, but in the paid version it is possible to return to the previous settings.

Video: how to change IMEI on Android using Device Id Changer Free

Chamelephon

The Chamelephon application is also suitable for changing IMEI, but this requires root rights.

Video: replacing IMEI on Android with Chamelephon

How to use IMEI to find a stolen or lost device

It is worth noting that the chances of finding a lost or stolen gadget on your own are very low for two reasons:

• No necessary equipment to search by IMEI: in order to find a stolen or lost device, you must have access to special equipment, as well as databases of all mobile operators in the country where the loss or theft occurred. It is thanks to this that you can determine the location of a lost device and a new one. mobile number, which is used by the gadget. The problem is that only law enforcement officials have access to equipment and information;
• there is no access to information about the location of the device: absolutely all online services that the user can find on the Internet, as well as applications and programs supposedly for searching smartphones by IMEI, are completely ineffective. Operator only cellular communication has the right to provide information about the location of devices at the request of the police, who accepted a statement from the owner about the theft. So you shouldn’t turn to online services and various applications to search for stolen or lost devices.

The only sure way to find your gadget is to contact law enforcement agencies to file a theft report. The police, in turn, submit a request to the mobile operator to search for the device. Quite often this method leads to the discovery of smartphones and tablets.

Search process lost devices occurs using IMEI identifier

Google service "Find my device"

Google provides a service that can help you find your device if it is authorized in account Gmail.

To quickly find your smartphone if you lose it, it is recommended to follow some tips:

• fill out a business card with contact information on your smartphone or tablet. This will help, in case of loss of the device, the finder to find the owner of the device to contact him;
• install the TheftAlert application on your device, which is designed to send an SMS message when changing the SIM card to a phone number specified in advance;
• If you lose your device, immediately use one of the services (for example LoSToleN), which will allow you to add the IMEI of the gadget to the database of stolen devices. Also in many similar services You can specify the amount of return reward.

Is it possible to remove IMEI

Since IMEI is a very important identifier for any device and there is no way to deliberately remove it.

But sometimes under the word " complete removal" also implies the following:

• force the IMEI not to be displayed on the screen by dialing *#06#, which is possible with certain knowledge in the field of programming;
• prohibit reading or accessing a memory cell. But what cannot be read, for example, via the RS-232 channel (computer port), can be read by a USB-Jig device (used in service centers to restore “bricked” Android devices) or, in extreme cases, by a programmer (a device designed for writing and reading information in ROM - read-only memory);
• forcing you not to release IMEI to the network upon request is problematic, but possible. But in this case, there is a high probability that service will be denied or the phone will never find the network.

Each operator has an IMEI database, request individual number The radio module is required when registering on the network, and if the network operator does not receive a 16-digit number upon request, it will not allow the phone to use the network. From all that has been said above, we can conclude that “complete IMEI removal” is impossible.

Due to the fact that IMEI is really important in every Android device, it is recommended to check it on all gadgets, rewrite it and save it in a safe place. If any difficulties arise, you can use methods to restore or replace IMEI.

Even the most reliable and proven smartphone models can sometimes break down. One of the most unpleasant situations occurs when the phone’s IMEI goes wrong.

How to restore IMEI on your phone

In some cases, users, when a smartphone starts to fail, decide not to take it to a service center, but rather independently update the device’s firmware. It also happens that in some cases the firmware is installed normally, everything works correctly, but you cannot make a call from the device. This means that the phone's IMEI has gone wrong. What is IMEI and how to restore it on Android, we’ll try to figure it out a little later. It is worth considering that everything you are going to do with your device, you do at your own peril and risk.

What is IMEI

IMEI is an abbreviation for the English term International Mobile Equipment Identity. If translated literally, this means International Identifier Mobile Equipment. In other words, this special code, which is used to detect and identify a phone on a mobile network. It's about not about the entire phone, but only about the radio module. Without this 15-digit number, the phone simply will not be able to receive or send calls. Finding out IMEI is quite simple. To do this, you need to dial the combination *#06# on your phone keypad. The code will appear on the screen. If instead of the usual numbers you see a combination of strange characters, this means that your IMEI has been lost. This could have been caused by crooked firmware or inept user actions. It's OK. In most cases, IMEI can be restored. This article will describe the process of restoring IMEI on Android smartphones. various models. The operating procedure will depend on the processor used in the device and the specific manufacturer.

Root rights

To use some software methods Repairing IMEI on your smartphone may require root access. These rights make it possible to change the system settings of the phone at a deep level, even deleting system applications. Superuser mode is initially disabled in all smartphones. If you decide to get it, you should be aware that after this valid warranty manufacturer will be invalid.

Devices based MTK processor

Each manufacturer has in its arsenal devices based on MTK processors. If you use just such a device, you can consider yourself very lucky. For MTK, the issue related to IMEI restoration on Android is not relevant. It is enough to use several engineering menu commands. So what needs to be done? Here are step-by-step instructions.

Step #1. Enter the engineering menu code. The default combination is *#*#3646633#*#*. This code allows you to access the phone's engineering menu. Through it you can delve into previously inaccessible system functions devices, as well as restore IMEI.

Step #2. Enter the IMEI repair command. With this action, everything is not so simple. Each manufacturer has its own special code. For Samsung it is ###8255## and ##4636##, for HTC smartphones– ##3424##, ##8255##, ##4636##, for Sony Xperia##7378423##, for Fly, Alcatel, Philips -##3646633##, for Huawei - ##2846579##.

Step 3. When necessary commands will be entered, you must reboot the device for the changes to take effect. If, after rebooting, the mobile device begins to search mobile network and managed to successfully register online, then you did everything correctly. If not, then this method doesn't suit you.

There are a number of problematic smartphones with which this trick does not work.

How to restore IMEI on Samsung Galaxy S3

There are some “problem” mobile devices that have special protection against changing factory settings. You can't figure out such phones without special tricks. One such device is the Samsung Galaxy S3. It is very difficult to recover the IMEI number on it. More problems Only iPhones are delivered. First, you need to download and install the EPS Professional program on your computer. This program allows you to create copies of IMEI, as well as restore a lost IMEI number.

However, the program can only restore the IMEI number from backup copy. If you don't have one, then you'll have to do everything manually. In the system folder of the mobile device firmware you need to find EFS folder. To do this, you must have root rights. Next you need to copy folder contents to the computer. The EFS folder should contain the files .nv_data.bak, nv_data.bak.md5, .nv_core.bak.md5, .nv_core.bak. If these files are in place, then you can roll back to the previous version of the firmware installed by default.

After successful flashing, you need to remove the .bak extension from the copied files and move them to the EFS folder on your phone. Next, you need to reboot the device. As a result, IMEI should be restored. If you do this operation If it doesn’t work, there’s only one thing left to do – take the device to a service center. There is nothing more you can do on your own. You can try to find information about restoring IMEI on Android after Samsung firmware Galaxy S3. There may be other ways to repair IMEI.

How to restore IMEI on mobile devices from Lenovo company

Lenovo devices may also experience problems related to recovery IMEI numbers, although they are not as serious as those of devices from Samsung. Chinese in this issue ahead of the Koreans. First of all, to repair IMEI you will need a program called Mobile Uncle Tools. This program is distributed free of charge, you can find and download it without much difficulty. You can also use the Maui Meta 3G program. However, Mobile Uncle Tools is more popular, so let's consider the option of using this program. So, how can you restore IMEI on an Android smartphone from Lenovo? First of all, you need to install the Mobile Uncle Tools program and all the drivers required for your device. After that, launch the program and click on the Engineer Mode button, then MTK Engineer Mode.

As a result, you will find yourself in engineering menu. It is important that while performing all these manipulations, the phone is not disconnected from the computer. It is also necessary to write off Phone IMEI. To do this you need to open back cover device and remove the battery. Now connect your phone to your computer and find the CDS Information tab in the program. Press Radio Information and Phone 1. In command line the program needs to enter the command AT+EGMR=1.7, “imei”. As “imei” you must enter the IMEI of the phone you wrote off. Now click on the Send AT Command button and wait for a while. After successfully completing this operation, you need to reboot the device and check the IMEI.

As you can see for yourself, you don’t have to rack your brains for a long time over restoring IMEI in Lenovo devices. The fact is that the manufacturer did not block access to file system on their smartphones. For this it is worth saying a special thank you to them. The Mobile Uncle Tools program is generally suitable for any device based on MTK processors. So, if you did not succeed when using the engineering codes described in the first method, you know how you can restore IMEI on Android after flashing it. The Mobile Uncle Tools program should help resolve this issue. Moreover, it is quite simple to use. The main thing in this matter is to strictly follow all instructions.

Otherwise, you risk getting a “brick” that will be very difficult to revive yourself. If all operations are performed correctly, the device is still for a long time will make you happy stable work. If you cannot correct the situation yourself, you will have to contact a service center. However, few service centers Today they agree to undertake the repair of smartphones whose system has already been tinkered with. Most likely they will immediately offer you a replacement. motherboard, and this is completely different money.

Repairing IMEI on Explay smartphones

Given Russian manufacturer has been known on the mobile device market for quite some time. Devices from this manufacturer combine attractive price And high quality. Everything here is almost like the Chinese. In general, there are some similarities between smartphones from Lenovo and Explay. How can I restore IMEI on Explay devices? Everything is the same here as for Lenovo smartphone. Both manufacturers use MTK processors. For this reason, you can use the same method as when restoring IMEI on a Lenovo device, namely Mobile program Uncle Tools.

You can also try using the original Maui Meta 3G program. You need to download and install the program Maui meta 3G. It is also necessary to install for the device necessary drivers. After that, run the program, and in the Action tab, click on the Open NVRAM Database File button. Select the BPLGUInfoCustomAppSrcP_MT6582 file from the previously downloaded firmware for your mobile device. After this, you need to click on the Disconnect button and turn off the phone. Now connect it to your computer. Click on the Download IMEI button and enter the decommissioned IMEI without the last digit in the window that appears. Then she will appear on her own. Click Download To Flash and wait.

When the process is completed, disconnect the device and start it. Check IMEI. If everything goes well, the program window can be closed. As you can see for yourself, there is nothing complicated in restoring IMEI on smartphones from Explay. In many ways this process similar to a similar operation for a Lenovo smartphone. Only Samsung decided to hide its phone system from users. This approach, on the one hand, is quite logical - after all, there is no danger that users who inadvertently accessed the firmware will “kill” the phone. Perhaps this is exactly what Samsung engineers were counting on. It is almost impossible to restore IMEI on such a device on your own. You will have to pay a considerable amount for service at a service center.

Repairing IMEI in Chinese smartphones

To begin with, it would not hurt to figure out which smartphones can be classified as purebred “Chinese”. This phrase is usually used to describe cheap copies. expensive smartphones, assembled from cheap components by Chinese workers. Such a smartphone is usually distinguished by a “crooked” translation of the system into Russian, as well as the presence of many unnecessary additional functions. Quite often, such smartphones have a television receiver. As a rule, the screens in such devices are non-capacitive, so in order for them to function normally, you have to poke something thin into them. But despite this, such devices are sometimes installed Android system. This means that the issue of IMEI restoration is also relevant for such counterfeits.

Separately, it is worth noting that IMEI restoration for Chinese phones the process is quite complicated. If in formation system folders While “normal” mobile devices have at least some logic, in the case of Chinese smartphones it is completely absent. Much easier to download required file from the Internet. If required firmware will be found for the smartphone, this does not mean that the difficulties end there. The whole point is that cheap ones connect Chinese smartphones to the computer using USB cable, and for firmware you will need a cable with a different pinout. This means that you will have to solder with your own hands. On specialized Internet resources you can find correct schemes wiring for certain models smartphones. When the cable is unsoldered and the required firmware is found, the task of IMEI repair will be significantly simplified.

IMEI (International Mobile Equipment Identifier) ​​is a unique identification number, assigned during production to mobile phones and tablets. It is recorded in a special memory cell of the device and plays important role in its functioning. If the ID is erased for any reason, the gadget will not be able to make calls or connect to the Internet. The information presented below will help you understand how to restore IMEI on an Android device.

What is IMEI?

The have number consists of fifteen digits. It is necessary to uniquely identify a mobile device. Why is it needed at all and what functions does it perform?

The IMEI identifier can be used for the following purposes:

• Determining the location of an electronic device in case of loss or theft.
• Blocking of a mobile phone by the operator at the request of the owner.
• Use of an identifier for wiretapping in the interests of investigating private conversations by intelligence agencies or the police.

Important to know

The IMEI number is linked to mobile device, and not to the SIM card. It remains unchanged when changing the SIM and when returning the smartphone to factory settings.

How to find out who owns your smartphone?

To restore memory on Android, you need to know it. Of course, if it has already been deleted from the smartphone’s memory, the task becomes more complicated. Where can you watch it? Let's look at all the options.

Through the mobile device menu

You can easily find out through the settings menu (if it has not yet been erased). The procedure is as follows:

Using the service team

You can also view your IMEI by using . The following manipulations need to be performed:

This and the previous methods are good when you want to record somewhere Smartphone IMEI"just in case". If it was not possible to do this, and the file in your smartphone has already been deleted, you will have to resort to other methods of determining the original device identifier.

So, where else can you find out the IMEI code? Let's figure it out.

Sticker on the packaging or under the removable battery

The fingerprint sensor is for you important function on a smartphone?

If the smartphone is not fake, unique number must always be indicated on the box in which it is supplied, among other information.

You can also find it on a sticker located under the battery of your mobile device. Unfortunately, this only applies to devices equipped with a removable battery.

please note

In the case of a dual-SIM gadget, two IMEI codes are used for each radio module of the gadget. If there is one radio module and two SIM cards, then the numbers will be the same.

Agreement with mobile service provider

The device identification number is always indicated in the contract concluded with mobile operator. If you need to restore your IMEI, you can always find it out from the contract.

Will be useful

If for some reason you cannot find your copy of the contract, do not despair: you can contact your customer service center with your personal passport mobile provider so that you are informed of the IMEI identification number.

Restoring IMEI on Android

Well, we found out how to find out the IMEI ID. Now let's find out how to restore IMEI on Android, for example, after a failed .

There are several methods by which you can restore your memory on Android. Their detailed description is given below.

Method 1. Through a special engineering menu

Every mobile phone has a specialized service software module, through which, with proper qualifications, you can change various important parameters device To restore the IMEI number via service menu the following manipulations must be performed: