Loss of registration in the network or the appearance of an unknown identifier “000000000000000000” on the screen of the Xiaomi smartphone is a signal of damage to the partition NVRAM. This is often the case after a failed flashing of the device, resetting the settings through Recovery or using unlicensed patches. IMEI-The phone becomes a media player unable to make calls or access the Internet via a mobile network.
Recovery of a unique hardware identifier requires a deep understanding of the Android architecture and the availability of specialized software.The process is not a standard procedure for the average user and carries risks, as it affects low-level systems.However, with strict adherence to algorithms and data backup, modem functionality can be returned to its original state.
In this guide, we will take a closer look at the techniques that are relevant to MediaTek and Qualcomm processors that underpin most Redmi and Poco devices. You will learn how to safely interact with engineering menus and specialized utilities. It is important to understand that changing IMEI to someone else's number is illegal, so it will only be about restoring the native values listed on the box or under the battery.
Diagnostics of the problem and preparation for recovery
Before you start taking action, you need to make sure that the problem is a software failure, not a physical failure of the antenna module. Primary diagnosis is carried out through system commands or special applications. Enter the dialing field code *#06# and compare the displayed data with the ones listed on the factory label.
If the fields are empty or contain zeros, you need access to superuser rights. Root rights allow access to system files that store the configuration of the radio module. Without the extended rights, most methods will not be available, because the system blocks the recording to secure memory areas.
⚠️ Note: Any manipulation of sections NVRAM or persist can lead to complete loss of communication.Be sure to create a full backup system through TWRP Or Mi Flash Tool.
For the job you will need a high-quality USB-The driver must be installed correctly, otherwise the PC will not see the phone in boot mode. Also make sure that the charge of the device is at least 60% to avoid sudden shutdown at a critical moment.
☑️ Preparations for recovery IMEI
Use of the MediaTek Engineering Menu
For devices based on MediaTek chips (MTK), the easiest way is to use the built-in engineering menu. This method does not require a connection to a PC, but only works if the underlying modem firmware is not completely damaged.
Once you log in, select the Connectivity tab, then go to the CDS Information section. Radio Information is your interest here. In the list that opens, select SIM1 (or SIM2 for the second slot). In the input field, you need to write an AT command to assign a new value.
The syntax of the command is AT+EML=imei, your code. In some versions of the MIUI shells, the syntax may differ, for example: AT+EGMR=1.7,"your code. "The number 7 indicates the first IMEI and the number 10 indicates the second. After you type the command, press the Send AT button.
What if the team doesn’t leave?
Once the command is successfully executed, the phone needs to be restarted. Check the result again via *#06#. If the code is saved and the network is back, the procedure is complete. However, on modern versions of Android, this method is often blocked by the manufacturer for security reasons.
QPST Method for Qualcomm Devices
Xiaomi smartphones based on Snapdragon processors require more powerful tools. QPST (Qualcomm Product Support Tools) allows you to interact with the diagnostic port of the device. To start, you need to activate the diagnostic mode. This is done through a hidden menu or ADB command: adb shell setprop sys.usb.config diag,adb.
Once you connect your phone, the Qualcomm HS-USB QDLoader 9008 or Diag port should appear in Windows Device Manager. Launch the QPST Configuration utility, add a new port, and go to the QPST RF Configuration program. Here you can write the necessary values in the IMEI section.
- 📱 Connect your smartphone in Diag mode and make sure the port is determined.
- 💻 Launch it. QPST and select the appropriate COM-port.
- 🔢 Enter the 15-digit code. IMEI in the relevant field of the program.
- 💾 Click the Apply or Write button to write data to NVM.
Importantly, new devices with SecBoot protection enabled may not be able to directly write via QPST without an unlocked bootloader and special certificates, and in such cases, a bundle of emulation or patching programs is used.
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Use only the originals. USB-ports on the PC motherboard, connecting through the front panel of the case or USB-Hub can cause communication to break at critical moment of recording.
Recovery with SP Flash Tool and Backup
The most reliable way that service centers often use is to restore an NVRAM partition from a backup, so if you or another user of the same model has a dump of that partition, you can fill it back in, using the popular SP Flash Tool.
You have to download a Scatter file that matches your model, and then go to the Format tab and make sure you don't format the extra one. We need the Download tab. In the file list, find nvram or persist, and specify the path to a good backup file.
The firmware process takes a few seconds. Once completed, a green success ring will appear. The phone will automatically restart. This method is effective when the partition's software structure is broken, but the memory chip is physically intact.
| Parameter | Description | Importance |
|---|---|---|
| Scatter file | Memory map of the device | Critically. |
| Section NVRAM | Stores calibrations and IMEIs | Tall. |
| BROM mode | bootloader without OS | Medium |
| CheckSum | File checksum | Tall. |
If you don’t have a backup, this method won’t help you create new data out of thin air, but it will restore health if the file was corrupted during the update.Always store copies of the persist and nvram partitions in the cloud immediately after you buy a new gadget.
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Having an exact copy of the NVRAM partition from an identical device is the only way to guarantee IMEI recovery without using paid server services.
Work with Xiaomi ADB/Fastboot Tools
There are many modified versions of standard debugging tools that are tailored to the Xiaomi ecosystem. ADB/Fastboot Tools from the developer community, often have built-in features to work with IMEI. They automate the input process. AT-team.
The interfaces of these utilities typically contain a code field and a "Write" button, and it itself puts the phone in the desired mode and sends commands, which makes it easier for those who are afraid to work with the command line, but the functionality is limited to the models for which the script is written.
When using third-party software, always check its digital signature and reviews in the relevant communities. Malware can not only fail to restore the phone, but also steal your personal data.
⚠️ Note: Using automated scripts from unknown developers can lead to the installation of hidden miners or backdoors.
If standard methods don’t work, your device may need professional boxing (like UnlockTool or Chimera), which are paid tools that are used by service center wizards to bypass complex defenses.
Frequent mistakes and ways to solve them
During the recovery process, users often encounter a “Write Fail” or “Check Sum Error” error, which means that the data has not passed the integrity check or the memory partition is blocked.
Another common problem is regional mismatches, whereby firmware on a global version on a Chinese device (and vice versa) can lead to identity conflicts, in which case a full data vape and re-write IMEI help.
If after all the manipulations the phone sees SIM-map, but does not catch the network (writes "Emergency Calls Only"), possibly damaged calibration data antenna, their recovery is possible only in the service center using specialized equipment.
- 🚫 Recording error: Check drivers and cable.
- 📉 No network: antenna calibrations damaged.
- 🔒 Blocking: Requires unlocking of the loader.
Don't despair if you don't get it the first time. The world of Android modding is complicated, and sometimes it takes a few tries or a change of software to get the results.
Can I recover IMEI without Root?
Legal and security aspects
It is important to understand the difference between recovery and change: Recovering a native number that has been lost as a result of a failure is a legal procedure for maintaining a device. However, changing the IMEI to an arbitrary number to hide the device in or to bypass the operator's locks is prohibited in many countries.
Operators run blacklist databases where stolen phones go, and if you try to embroidery a wanted phone, it won't work on the network anyway, because it's locked on hardware features that are harder to change than the code.
Always keep checks and boxes from your devices, which is the only proof that you own the gadget and have the right to restore its software, and if blocked by the operator, this will help unlock the device officially.