Modern smartphones Xiaomi, running shells MIUI or new HyperOS, regularly receive software updates. However, it often happens that the new version of the system is unstable, quickly drains the battery, or contains critical errors. In such situations, users have an urgent need to return to a previous, more stable version of the firmware.
The process of rollback, or downgrade, is a technically complex procedure that requires care and preparation. Unlike a simple over-the-air update, returning to an old version often requires manual intervention and the use of special tools. It is important to understandthat it is almost impossible to do this using standard system tools, since developers block the installation of old versions over new ones for the sake of security.
In this material we will analyze all the available ways to return to the previous version of Android, from simple reset methods to advanced flashing techniques via a computer. You will learn what risks exist, how to prepare the device and what tools ADB and Fastboot may be needed to successfully complete the task.
Why there is a need for a system rollback
The main reason why users want to rollback firmware updateis a decrease in performance devices. After installing the new version MIUI the smartphone may start to heat up, slow down in the interface, or take a long time to open applications. This often happens when moving between major versions of Android, when optimization has not yet been perfected.
Another common problem is the disruption of specific functions. For example, after the update, it may stop working correctly, the camera may start taking blurry pictures, and the module may refuse to pay. In such cases, returning to the factory version or the previous stable build is the only way to restore the usual experience of use. autonomy, the camera starts taking blurry pictures, and the module NFC - refuse payment. In such cases, returning to the factory version or the previous stable build is the only way to restore the usual user experience.
⚠️ Attention: System rollback often leads to complete loss of data. Before starting any action, be sure to create a complete backup copy of your contacts, photos and important documents on external media or in the cloud.
It is also worth considering that some banking or corporate service applications may stop working on new, not yet certified versions of the software. In this case, downgrade becomes a necessary measure to continue working with financial instruments. However, remember that every step back opens up potential security vulnerabilities.
Restrictions and blocking from the manufacturer
The company Xiaomi has implemented strict protection mechanisms that prevent the installation of an old version of the system over a new one. This is done to prevent attacks in which attackers could exploit vulnerabilities in older versions of Android to gain access to the device. Therefore, simply replacing the firmware file in the update folder most often ends in error.
The main obstacle is checking the version Anti-Rollback. This is a special security index that increases with every major update. If you try to install firmware with a lower Anti-Rollback index than the current one on the system, the process will be blocked at the bootloader level. In the worst case, this can lead to a “bricked” smartphone.
In addition, to carry out a deep rollback, an unlocked one is often required. Bootloader. On devices purchased in the global version, the bootloader is locked by default. Unlocking it requires waiting from 7 to 30 days and linking your account Mi Account to the device. Without this procedure, many rollback methods will not be available.
What is Anti-Rollback?
This is a protection mechanism introduced by Xiaomi that prohibits the installation of an older firmware version if the current version has a higher security index. An attempt to bypass this restriction on some models (for example, Redmi Note 7, Mi 8) led to a complete blocking of the device.
It is also worth mentioning regional restrictions. Firmware for different regions (China, Global, Europe, Russia) have different certificates and frequency settings. An attempt to roll back to a version of another region may cause problems with the operation of mobile communications bands 4G/5G.
Preparation for the procedure: backup and tools
Before taking active steps, you must carefully prepare the workplace and the device itself. Rolling back a system is a risky operation, and having the safety net of a fresh copy of your data is a must. Use built-in tools MIUI or third-party applications to create a complete backup.
You will need a computer with an operating system Windows, a working USB cable (preferably original) and a charged smartphone (at least 60% charge). You also need to download specialized software: drivers Xiaomi USB Drivers, platform SDK Platform-Tools (contains ADB and Fastboot) and the firmware file itself to which you plan to roll back.
☑️ Preparation checklist
Pay special attention to finding the correct firmware. It must be complete (Recovery ROM), and not an update (Incremental). The file must have the extension .zip for the method via the recovery menu or .tgz for the method via Fastboot. You can download them from official firmware aggregator sites, making sure that the version is newer than the one currently installed, but older than the one you want to remove (although usually they just look for the last stable one before the problematic one).
Rollback method through the Recovery menu (without a PC)
This method is the simplest and safest, but it does not always work. It is suitable for cases when you want to roll back one version or if the security policy allows the installation of the selected firmware. The essence of the method is to manually install the update archive through the built-in recovery menu.
First, download the full firmware archive (Recovery ROM) and rename the file to update.zip. Place it in the root of the smartphone's internal memory. Next, go to settings, select “About phone” and click on version MIUI. In the window that opens, click on the three dots in the corner and select “Select firmware file.” Find your archive and confirm the installation.
If the system displays the error “Can't verify update” or “Current version is newer than the selected one,” then this method is blocked for your version. In some cases, renaming the file helps, but most often a more radical approach is required. A successful installation will reboot the phone and begin the flashing process, which will take a few minutes.
| Method | Need a PC | Need an unlocked BL | Risk of data loss | Difficulty |
|---|---|---|---|---|
| Through the update menu | No | No | No (usually) | Low |
| Via Recovery Mode | No | No | Yes (on reset) | Average |
| Via Fastboot (MiFlash) | Yes | Yes (often) | Yes (always) | High |
| Via ADB Sideload | Yes | No | Depends on the firmware | High |
Using Fastboot mode and Mi Flash Tool
The most reliable, but also the most difficult way is flashing through the mode Fastboot using the utility Mi Flash Tool. This method allows you to completely clear memory partitions and write a clean version of the system, ignoring many checks, but it requires an unlocked bootloader.
First, put your smartphone in Fastboot mode by simultaneously holding down the power and volume down buttons while the device is turned off. Connect your phone to your computer. Run Mi Flash Tool, select the unpacked folder with the firmware and click the “Refresh” button so that the app sees the device. At the bottom, select the “Clean all” mode, which guarantees complete data clearing.
fastboot devicesThis command in the command line (after going to the platform-tools folder) will help make sure that the computer sees the phone in Fastboot mode. If the device is displayed, you can start the firmware process using the “Flash” button in the utility. The process will take from 200 to 600 seconds.
⚠️ Attention: When using the Fastboot method and selecting the "Clean all" option, all data will be permanently deleted. Make sure you have an up-to-date backup. Also, do not interrupt the process and do not disconnect the cable until it is complete.
If Mi Flash Tool gives the error “Miss matching image and device”, check whether the downloaded firmware matches your smartphone model. The firmware for the China version will not install on Global without additional manipulations.
Rollback via ADB Sideload and command line
Method ADB Sideload allows you to transfer the firmware archive directly to recovery mode, bypassing interface restrictions. This is an intermediate option between simple installation and complete flashing. It requires a PC and installed drivers, but does not always require an unlocked bootloader (depending on the Android version).
Put the phone into Recovery mode (hold power and volume up). From the menu, select your language (if available) and navigate to “Connect with MIAssistant” or “Sideload”. On your computer, open a command line in the folder with ADB and enter the command to start the file transfer.
adb sideload update.zipAfter entering the command, the file transfer will begin. A progress bar will appear on the phone screen. If after transfer the installation does not start automatically or gives a signature verification error, then this method will not work without first manipulating access rights. Often this method is used in conjunction with temporarily obtaining root access, which further complicates the process for a beginner.
The safest rollback method for the average user is to wait for a corrective update from the manufacturer or use the factory reset function if the problem is not critical.
Frequently asked questions (FAQ)
Is it possible to roll back without losing data?
In most cases, when downgrading (rolling back to an older version), the system requires a complete data reset due to changes in the structure of file systems and databases. You can save data only when upgrading to a newer version, but not vice versa. Always count on complete loss of information.
What to do if the phone stops turning on after a rollback?
If the device went into a bootloop (cyclic reboot) or a black screen, try entering Recovery mode and doing a Wipe Data/Factory Reset. If this does not help, you will need to flash it via Fastboot using the Mi Flash Tool. In the worst case, if the bootloader is damaged, you will need to contact a service center.
Will the warranty be reset after rolling back the firmware?
Officially, a change in software not authorized by the manufacturer (for example, unlocking the bootloader) may be grounds for denial of warranty service. However, if you simply updated through the menu, and then rolled back the same way without unlocking BL, formally there should be no traces of interference.
Where can I find the old firmware version for Xiaomi?
Officially, Xiaomi does not provide an archive of old versions on the website. Users have to resort to trusted third-party aggregator resources, where copies of official assemblies are stored. When downloading, always check the hash amount of the file and the publication date to avoid infected modifications.
Does a rollback affect the operation of banking applications?
If you unlocked the bootloader to rollback, banking applications (Mir Pay, SberBank, etc.) may stop working due to a violation of the integrity of the security system. You can return them to work only by blocking the bootloader back (Lock), but this is only possible on the global version of the firmware and can lead to a brick on the Chinese version.