Owners of Xiaomi, Redmi and Poco smartphones often face a situation when, after the automatic arrival of a new version of MIUI or HyperOS, the device begins to work unstable, the battery runs out in half a day, the interface slows down, and the usual functions cease to respond correctly to commands, at such moments, the only reasonable way out is to decide to reset the system to the previous, more stable version.
The rollback procedure is a technically complex process that requires careful understanding of the structure of the Android file system. Unlike a simple reset, here we will change the version of the operating system itself, which imposes certain restrictions on the part of the manufacturer. Xiaomi implements anti-Rollback protection mechanisms that are designed to protect the user, but can become an obstacle when trying to go back.
Before you take action, you need to weigh the risks. If you don't take the steps right, you can turn your phone into a brick and require expensive repairs at the service center. However, if you follow a clear algorithm and use official tools, the chances of a successful return to the comfortable version of firmware are very high.
Risk assessment and device preparation
The first step of any software intervention is deep preparation. Resetting an update involves completely cleaning up user data, so backing up is not a recommendation, but a must. You can use Google's cloud services or the built-in Mi Cloud app to save contacts, photos and notes.
The battery charge is very important, and the flashing process is very energy-intensive, and suddenly turning off power at a critical time, making sure the battery is at least 60-70% charged, and it's best to keep the device connected to the power source throughout the entire procedure.
⚠️ Warning: Before starting the procedure, be sure to check whether Mi Account is locked.If you don't remember the password from your Xiaomi account tied to your phone, the reset may lock the device permanently. log out in the settings or make sure you remember the login details.
You will also need quality. USB-It's a cable, preferably original, that came with a package, or a certified analogue. Cheap cables from electronics stores often don't provide stable data transfer, which can lead to a recording error during the firmware process through the computer.
Anti-Rollback protection mechanism and its verification
Xiaomi has implemented an Anti-Rollback (ARB) security mechanism that prevents an older firmware version from being installed if the new firmware has an increased security index, so that attackers can’t inject vulnerabilities from older versions of Android into the system. If you try to install a firmware with a lower ARB index than the current one, the process will stop, and in the worst case, the device will go into the bootloom.
You can check the current protection index in several ways. The easiest way is to look at the Settings section. → About the phone. Find the line "Version." MIUI» And press it fast. 5-7 In the menu that appears, look for the Anti-version option or just the number after the build number. You can also get information through Fastboot mode by connecting your phone to your PC.
It is important to understand the difference between global (Global) and Chinese (China) firmware. The security mechanism can work differently depending on the region. Usually the Anti-Rollback index increases when you upgrade to major updates, for example, from Android 12 to Android 13, but can also change as part of minor security updates.
What does the Anti-Rollback error mean?
If the security index of the new firmware (which you want to install) is less than the index of the current installed system, the bootloader will block the installation. In Recovery mode, this may simply prevent the process from starting, and in Fastboot mode using Mi Flash, the utility will give an error "Anti-Rollback check failed." Ignoring this can not - trying to force the process through engineering methods will lead to hardware locking of the processor.> The choice of the rollback method: Recovery or Fastboot There are two main ways to return the previous version of the software: through the built-in recovery menu (Recovery) and through the boot mode of the download format 140, you want to use the current version of the Recovery check (Flipblock).0, for example, you, you use the Recovery version, if you use the Recovery version, you use the Recovery version, for example, you use the Recovery version, and the version, you use the Recovery version, if you use the Recovery version, if you use the full version, you use the version, 14 This is considered safer for beginners, because it's less invasive and doesn't require drivers to be installed on a PC. However, it only works if the Anti-Rollback indexes match or allow rollback. The Fastboot method is a more powerful tool. It allows you to "clean" the phone by changing any version of the system the bootloader formally allows. This will require the Mi Flash Tool utility and.tgz firmware. This method is necessary if the phone is not already booting or if the rollback through Recovery is not possible. Feature Recovery Mode Fastboot Mode Needs PC No need (only file on phone) Recovery firmware file type ROM (.zip) Fastboot ROM (.tgz Data Saving Only with a complete cleanup (when changing region) Complete cleanup (Clean All) Complexity Low Medium/High Instruction: Recovery Firmware rollback This method is suitable for most users who want to reset the update without connecting to a computer. You will need to download the corresponding version of the firmware (Recovery). ROM) It's important that the firmware be the same regionality as the current one (Global to Global), or be ready to clean up the data completely when you change region. Copy the downloaded.zip file into the root of the phone's internal memory. Don't put it in folders, otherwise the system may not see it. Then go to the update menu: Settings → The phone. → Version. MIUI. Click on the three dots in the upper right corner and select Select firmware file. The system will check the integrity of the file. If correct, the phone will prompt you to reboot to Recovery mode. After the reboot, select the language (usually English or Chinese, if there is no Russian) and click Wipe Data. This is a critical step – without data cleaning, rollback is often impossible due to file structure conflicts. ⚠️ Note: When you select Wipe Data, all your photos, contacts and apps will be deleted. If you do not back up, it will not be possible to restore the data. After cleaning, select Connect with MIAssistant (if required) or simply follow the instructions on the screen to install the previously selected zip file. the process will take 5 to 15 minutes. Instructions: Fastboot and Mi Flash flash If the soft method did not help, you will have to use the "heavy artillery" - the Mi Flash Tool utility. HS-USB QDLoader or ADB Interface to your computer. Download the archive from Fastboot. ROM (Extension.tgz) and unpack it into the root of the C disk so that the path is short, such as: C:\xiaomi_rom\. Turn off the phone completely. Press the Volume Down and Power buttons simultaneously until the Fastboot logo appears. Connect the phone to your PC with a cable. Launch the Mi Flash Tool on behalf of the administrator. In the program, press the Refresh button to let your computer see the device. In the path bar, specify the folder with the unpacked firmware. At the bottom of the window, be sure to select the Clean All option). This ensures that the old system files will not conflict with the new (old) version. The CMD connection check command (if Mi Flash can't see the device): fastboot devices Press Flash. The recording process will begin. At this time, you can't touch the cable or the computer. Once completed, the phone will automatically restart. The first run can last up to 10 minutes, it's OK, the system is optimized. The solution to common errors during the downgrade process, users often encounter various failures. One of the most frequent is Error 7 when installed via Recovery. It means that the update file inside the updaterscript is an archived, which is easier to fix the current resetting method (the resetting). If the phone is stuck on logos MI Or Poco, try going to Recovery. + Power) and make Wipe Data / Factory Reset. If this does not help, it is possible that the userdata partition is damaged, and you will need to flash through Fastboot with the Clean All option. In Windows Device Manager, the device can appear as "Unknown Device" in which case you need to manually update the driver by selecting it from the list. USB-Xiaomi or Android devices, sometimes it helps to replace them USB-If the device is responding to the Recovery or Fastboot login buttons, if the screen is black and there is no response to the charger or buttons, can the upgrade be reset if the phone is not turning on. Only the regime will help. EDL (Emergency Download Mode, which often requires disassembling the phone and closing contacts on the board, or an authorized Mi Account to flash through the server. Will the warranty be reset after the firmware rollback? Formally, installing global firmware on the Chinese version or unlocking the bootloader (which is often required for a deep downgrade) is unwarranted. However, if you just roll back to the official version of the same region through a standard menu and there is no external trace of interference, the service center may not notice the change unless you do a deep diagnostic of the logs. What is the minimum percentage of charge required to reset? The critical minimum is considered 40%, It is strongly recommended that at least 60-70% The process of writing system partitions is very sensitive to voltage surges. If the battery is dead when you write a boot or system partition, it's going to be very difficult to restore the phone without a programmer. Do I need to unlock the bootloader to roll back? For rollbacks within a single region (Global to Global) and with anti-Rollback regulations, unlocking the bootloader is usually not required. However, if you want to reflash the phone from China to Global or roll back over the point where the lock is located. ARB, Unlocking the bootloader (Unlock Bootloader) is mandatory.