Changing the unique identifier of a mobile device is a procedure that Xiaomi users resort to for various reasons, most often associated with restoring the health of the smartphone after unsuccessful experiments with firmware or damage to system partitions. IMEI (International Mobile Equipment Identity is a digital passport of your gadget in cellular networks, and its absence or incorrect value leads to the inability to register in the network, call and use the mobile Internet. Owners of popular models such as Redmi Note or Poco, often face a situation where after flashing the Chinese version on the global or installing custom Recovery, the phone stops seeing. SIM-map.
It is important to understand that changing this code is a technically complex process and carries certain risks for the stability of the device. Modern Android operating systems, including the MIUI shell and the new HyperOS, have several levels of protection against unauthorized interference with system files. Changing the IMEI in countries with strict legislation (including Russia) is illegal if the purpose is to clone someone else's number or bypass operator locks. This article is purely informative and describes the technical aspects of restoring factory parameters or changing the identifier for test purposes on personal equipment.
Before you start taking action, you need to make sure that you have root rights or unlocked bootloader, as this operation cannot be performed using standard settings menu methods. The process requires care, since a single-digit error can lead to the modem not functioning correctly and recovery takes a considerable time. Next, we will consider the main methods, tools and pitfalls that you will face.
Preparation of the device and necessary tools
The success of the operation depends on the quality of the workspace and the smartphone itself. The first step is to ensure a stable connection between the computer and the mobile device. USB-And so, we have a cable that can transmit data, not just charge the battery, and cheap cables often cause communication disruptions at the critical time of writing data. NVRAM, What can turn a phone into a brick».
The second important aspect is drivers. Xiaomi system partitions often require specific drivers, such as the Qualcomm HS-USB QDLoader 9006 or MTK USB Port, depending on your device’s processor (Snapdragon or MediaTek). Without properly installed drivers, your computer will not see the phone in deep diagnostic mode, and you will also need to activate the USB debugging mode in the Developer Menu.
☑️ Checklist of preparations
Remember to back up your important data. Although the IMEI change procedure affects the system partition, there is always a risk of losing personal files, contacts and photos. Use the built-in MIUI backup tools or third-party utilities. If something goes wrong in the process, you can quickly bring the device back to life by saving important information.
IMEI recovery via the Engineering Menu (MTK Engineer Mode)
For devices built on MediaTek processors (many models of Redmi and Xiaomi budget and mid-size), there is a built-in diagnostic and customization tool, accessed through a special menu called by the code in the “caller.” Enter the combination ##3646633## or ##4636##. If the code does not work, it is possible that access to the engineering menu is blocked by the operator or manufacturer, and additional utilities will be required to unlock it.
Once you log in, you go to the Connectivity tab, then select CDS Information. In the list that opens, you look for Radio Information. Here, at the bottom of the screen, you'll see a field for AT commands. That's where the modem interacts. The command has a strict syntax and must be entered without errors.
To set the new identifier, a command of the form AT+EGMR=1.7, "YOUR IMEI" is used. Please note: for the first SIM slot, the option is 7, for the second one is 10. After entering the command, press the Send AT button. If the operation is successful, the OK answer will appear in the log. Immediately after that, it is recommended to restart the device so that the changes take effect.
What to do if the engineering menu is not opened?
Use ADB and Root Rights for Advanced Users
A more versatile, but more complex, method is to use the Android Debug Bridge (ADB) debugging bridge in conjunction with root rights, which is suitable for devices on multiple platforms, including Snapdragon. First, you need to get superuser rights, which on modern Xiaomi models can be difficult due to the company's policy regarding unlocking the bootloader.
Once you have root access and installed a terminal (such as Termux or Terminal Emulator), you have direct access to the file system. The key file that stores network identifiers is often a file in /data/nvdata/WIFI or modem-specific files in /persist. However, direct editing of these files by a text editor is extremely dangerous because of checksums.
A safer way is to use specialized scripts or utilities like Chamelephon (for older devices) or Xiaomi. IMEI Changer, which automates the recording process through system calls. ADB commands are entered in format:
adb shell
su
echo "AT+EGMR=1,7,\"123456789012345\"" > /dev/smd0The path to the device (/dev/smd0) can vary depending on the model and kernel version.Caution: The wrong path can lead to writing junk data to the system log or other critical partitions, causing a cyclic bootloop.Always check the current documentation for a particular CPU model.
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Use the "ls /dev/" command in the root-right terminal to find the active modem device, often called smd0, ttyUSB0 or similar, depending on the drivers.
Table of compatibility of methods and models
Not all methods work equally well on all devices. The choice of tool depends on the architecture of the processor and the version of the operating system. Below is a comparison table that will help you navigate the available options for popular smartphone series.
| Model/Series | Processor | Method through the Engineering Menu | Root rights required | Risk of discharge |
|---|---|---|---|---|
| Redmi Note 9 / 10 | MediaTek | High (working steadily) | No. | Low. |
| Xiaomi Mi 11 / 12 | Snapdragon | Low (often blocked) | Yes. | High-pitched |
| Poco X3 / X4 | Snapdragon | Medium (depending on region) | Yes. | Medium. |
| Redmi 9A / 10A | MediaTek | High-pitched | No. | Low. |
As you can see from the table, owners of devices based on MediaTek are more fortunate: built-in tools allow you to perform manipulations without deep hacking. Snapdragon users often have to resort to sophisticated methods with root access, which automatically increases the responsibility for each action.
Risks, consequences and legal aspects
Changing the IMEI is not just a technical setup, it is an action with legal consequences. In the Russian Federation, according to article 138 of the Criminal Code, changing the unique identification code for use in communication networks can be regarded as illegal interference with the operation of communication networks.
⚠️ Attention: Change IMEI It is a criminal offence to use a stolen phone or to hide its location. This article describes how to restore factory settings when software breaks.
From a technical point of view, incorrect data recording can lead to loss of warranty. Xiaomi service centers easily detect interference with system partitions during diagnosis. In addition, some banking applications and services (Google Pay, Mi Pay) may stop working on a device with a changed or “broken” IMEI, because security systems mark such devices as compromised.
Another risk is the “grid” of Wi-Fi and Bluetooth certificates. In modern smartphones, this data is often stored in the same secure partition as IMEI. Sloppy editing can lead to the fact that the phone will no longer see Wi-Fi networks or connect via Bluetooth, and it will be almost impossible to restore this software without factory dumps (backup) for your particular device.
Alternative solutions and restoration of factory values
If your goal is not to hide a device, but to make it work again after a failure, it is often more effective not to sew a new number, but to restore the original one. The factory IMEI is always listed on the phone box and on the sticker under the battery (if it is removable) or on the back, and keeping this data in a safe place is the golden rule of any smartphone owner.
For recovery, you can use official service utilities such as the Xiaomi Flash Tool combined with the original firmware containing the correct region. Sometimes, simply flashing the stock version of the software through Fastboot with clear all data returns the correct values if the NVRAM partition was not physically damaged.
In cases where software methods don’t work, only an authorized service center is left to engineers, who have access to closed databases and tools to rewrite IMEIs at the hardware level, which is the only legal way to fix an error if it is not your fault (for example, a factory defect).
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The most reliable way to avoid IMEI issues is to never interfere with the system partitions of the modem without an urgent need and always have an EFS/NVRAM backup before any experiments.