How to Reverse Xiaomi to the Previous Version MIUI 12

Modern shell updates often bring not only new features, but also unforeseen bugs that can significantly reduce the comfort of using a smartphone. Many users of Xiaomi, Redmi and POCO devices face situations when the system starts to work slower after an upgrade, there are problems with autonomy or the usual settings disappear, in such cases, the only sensible solution is to return to a stable version of software that has already proven to be reliable.

The process of downgrading the firmware version, or downgrade, is technically more complicated than a regular update and requires strict adherence to the algorithm of actions. Wrong actions can lead to complete inoperability of the device, so before starting the procedure, you need to carefully study the theoretical part. In this article, we will discuss the current ways to return to MIUI 12, using both standard methods and specialized software for PC.

It should be noted right away that the rollback procedure almost always involves the complete removal of user data. Backup of photos, contacts and documents is not just a recommendation, but a prerequisite, ignoring which will lead to the loss of important information.

Risk analysis and data preparation

Before you start manipulating the system partition, you need to understand the degree of responsibility. System rollback is an invasion of the file structure, where errors are unacceptable. The main risk is the ability to turn the phone into a brick if you interrupt the recording process or use a file that is not intended for your modification of Xiaomi. Especially critical battery status: the charge must be at least 60% so that the device does not turn off at the most inopportune time.

The second important aspect is locking the bootloader. A full downgrade through your computer often requires an unlocked Bootloader. If your device is locked, standard methods may not work, and trying to use them will lead to a version check error. Users with a blocked bootloader are only available to limited ways through the recovery menu, which do not work in all cases.

⚠️ Warning: Using firmware from unverified sources can lead to the installation of malicious code or damage to system libraries.

The process of preparing data should be as complete as possible. Don't just limit yourself to photos, think about Wi-Fi passwords, two-factor authentication settings and local application files. Once the system is reset, it will be impossible to restore them without prior (backup) use cloud services or transfer files to an external drive.

Also, check the device model in the About Phone section. Write down not only the model name (like the Redmi Note 10), but also the internal code name (like sunny). The firmware designed for the global version won't fit in the Chinese version, and vice versa, if the regions don't match. The mistake in choosing a file's regional affiliation is the most common reason for failed firmware attempts.

Choosing the Right Version of the Firmware

The key to a successful rollback is finding the correct system image file. You need the version of MIUI 12 that was released before the one installed now. Xiaomi's security system has an Anti-Rollback mechanism that prevents installing the old version if the current one has a higher protection index. However, in most cases, switching from MIUI 13 or 14 to 12 is possible if the conditions for compatibility of regions are met.

Firmware files are divided into two main types: Recovery (zip) and Fastboot (tgz). To roll back without a computer and unlock the bootloader, we will need a.zip file designed to be installed through the Recovery menu. Fastboot firmware requires a connection to a PC and use the Mi Flash Tool utility, which gives more features, but also more difficult to execute for beginners.

It is important to pay attention to the firmware region. Global versions are marked with the letter Global or MI, European - EEA, Russian - RU. Attempting to install global firmware on a device with European firmware through the standard update menu will end with the error "Can't verify update", in which case either complete matching of regions or using methods with the unlocked bootloader is required.

When downloading a file, be sure to check its checksum (MD5 or SHA1) if such information is provided by the archive author, this ensures that the file is fully loaded and not corrupted during transmission over the network. A damaged archive can cause a reboot cycle or installation verification error.

Recovery Method through Recovery Menu

The most affordable way to return a previous version of MIUI is to use a built-in recovery menu, which does not require a computer or complex tools, but only works if the firmware version in the archive is newer or equal to the current one (which is rare in downgrades), or if you use special methods to bypass verification. However, often the system blocks the installation of an older version, so this method is worth trying first as the least risky one.

To start, place the downloaded firmware.zip in the root of the device's internal memory. Rename the file to update.zip for convenience, although this is not always necessary. After that, go to Settings → About Phone → MIUI version and click on the three dots in the upper right corner. Select "Select firmware file" and specify your archive.

If the standard update menu refuses to install a file, citing that the version is older than the current one, you will have to use Recovery mode. To do this, turn off your smartphone and press the combination of the buttons Volume up + Power. In the menu that appears, select the language (usually English or Chinese) and click on the Install Update icon (or “Install update.zip”). The system will check and, if the file fits, will begin installation.

If successful, the installation process will begin, which will take 5 to 15 minutes, the screen can go out and light up, the device can reboot — this is normal behavior. Once the procedure is complete, the phone will automatically reboot to the cleaned system. The first run can last longer than usual, as applications are optimized and a new file structure is created.

Use of Mi Flash Tool and Fastboot Mode

If the Recovery method didn't work because of strict version checks, the only option is to use Fastboot mode and Mi Flash Tool on your computer, which allows you to force the system image to be recorded, ignoring some limitations, but requires an unlocked bootloader. Without the unlocked Bootloader, the program will simply not allow you to start the firmware process.

To work, you will need to download the Fastboot firmware archive (extension.tgz) and unpack it into the root of the C disk so that the path does not contain Cyrillic and is short, for example, C:\rom\. Next, drivers must be installed. ADB And Fastboot, and Mi Flash, and plug the phone off into your PC, and hold the Loudness button down until you see a bunny in an orange cap on the screen.

fastboot devices

This command in the command line will help check if your computer sees your device. If the serial number is displayed, then the drivers are installed correctly. In Mi Flash, click the Refresh button, select the path to the folder with the unpacked firmware, and in the lower corner select clean all mode, which will completely clear the memory and install the new system.

Once you select the mode, press the Flash button, the process will go quickly, but you can't interrupt it. If there is an error in the process, check the USB cable, connection port or firmware file integrity. Successful completion will be marked by a green bar in the program and automatic reboot of the smartphone.

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Use the original. USB-cable and connect it directly to the PC motherboard port (back of the system unit) to avoid communication breaks when firmware is running.

Solving common mistakes

In the downgrade process, users often encounter a message saying, "Current version is newer than the selected one." This is standard system protection. If you're confident in the file and unlocked the bootloader, this error may be ignored in Fastboot mode, but in Recovery, it blocks the installation, in which cases it helps to switch the region in the phone's settings before trying to upgrade, although this does not always work.

Another problem is the bootloop cycle after installation, and if the phone shows the Mi or Redmi logo endlessly, try logging in to Recovery and doing Wipe Data. If that doesn't work, you may have installed firmware from another model or an incompatible region, and then only flashing through the Fastboot with a full cleanup will help.

⚠️ Note: When locking the bootloader after firmware, make sure that the region of the device and firmware match 100%.Blocking Chinese firmware on the global device (and vice versa) will make it impossible to boot the system.

Driver errors in Windows can also interfere with the process if the device is defined as "Unknown Device" or «QHSUSB_BULK», You need to manually update the driver through Device Manager, indicating the path to the folder with Qualcomm or Xiaomi drivers. ADB Driver.

Set up the system after rollback

After a successful return to MIUI 12, you will get a clean system without your personal data.The first thing you need to do is reset the initial setup, select a language and connect to Wi-Fi. Don’t rush to restore all applications immediately from Google backup, as some of them may have been updated to a new version of Android and may conflict with the old shell.

It is recommended to manually install only the most necessary applications and check the stability of the system for a few hours. Pay attention to battery consumption and heating. If everything is stable, you can gradually restore the rest of the content.

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The stability of the smartphone after rollback depends on the quality of the backup made and the accuracy of the selected firmware version.

In conclusion, rollback is a last resort: If you decide to stay on an older version of MIUI, be prepared for the fact that some new apps may stop supporting your version of Android over time. Regularly check the security of the device and install security patches if they are available as updates for your version.