How to roll back Xiaomi from Android 12 to 11: Step-by-step instructions

Modern updates to the operating system for Xiaomi smartphones often carry not only new features, but also unforeseen bugs that can significantly reduce the comfort of using the device. Users often face a situation when after upgrading to Android 12 or a new shell MIUI battery begins to run out in a few hours, and the interface works with noticeable delays.

The process of system rollback, or downgrade, is technically more complicated than a regular update installation and requires the owner of the gadget to be more attentive and accurate in actions. It is important to understand that this operation cannot be performed using the standard Settings menu tools, since the security system blocks the installation of older versions of the firmware on top of new ones. You will need to go through the procedure of unlocking the bootloader and use special tools to flash the device in Fastboot mode.

Before we get to the practical steps, we need to understand the risks and prepare all the necessary components. Downgrade is an irreversible process in the context of user data, so loss of information is inevitable if we do not take care of backup in advance. In this article, we will discuss in detail all the steps of preparing, finding the right software and installing the old version of Android directly to minimize the likelihood of errors.

Risk analysis and data preparation

The first and most critical step is to realize that downgrade involves completely erasing the device’s internal memory. Android’s data protection mechanism prevents users from saving their information when they migrate to an older version of the system due to changes in filesheet structure and encryption. So creating a full backup is not just a recommendation, but a mandatory requirement before any manipulations begin.

To save contacts, photos, documents and application settings, it is best to use cloud services or specialized software. Xiaomi smartphone owners can use a built-in backup tool that allows you to save data on the Internet. SD-But to ensure that the data is safe, it's more reasonable to duplicate important information on your personal computer.

⚠️ Note: During the rollback process from Android 12 to 11, the full formatting of the UserData section will be performed. All files, including photos, music and installed applications, will be irretrievably deleted.

Also consider the battery status of your device. Interrupting the firmware process due to battery discharge can lead to serious consequences, up to turning the smartphone into a “brick”. Make sure that the device is at least 60-70% charge, and the USB cable you plan to use is healthy and provides a stable connection without interruptions.

Necessary tools and software

To do this successfully, you'll need to build a set of tools that are essential to the process. The main component is a computer running Windows, because most of the tools for Fastboot and ADB are optimized for this platform. Although there are analogues for Linux and macOS, they may require additional driver settings.

The key piece of software is the Xiaomi Flash Tool, an official application developed by the company's engineers to run the devices through boot mode, which is the interface that will select the firmware file and start the process of writing data to the phone's memory, and download the current version of the program only from official resources or trusted developer forums.

In addition, the computer must have the appropriate ADB and Fastboot drivers installed. Without them, the computer will not be able to recognize the connected smartphone in a special mode. Often these drivers come with the Mi Flash Tool, but in some cases they have to be installed separately, especially if you use custom Windows builds or older versions of the OS.

• 📱 Xiaomi smartphone with unlocked bootloader (mandatory condition).
• 💻 PC with Windows and installed Xiaomi Flash Tool.
• 🔌 Original or quality cable USB Type-C.
• 📦 Fastboot firmware for Android 11 (version should be lower than the current version).
• 🔋 Charge of the device at least 60%.

Unlocking the Bootloader bootloader

The most difficult and longest step for many users is unlocking the bootloader. By default, all Xiaomi smartphones come with a locked Bootloader, which prohibits the installation of unofficial software and downgrade systems. To remove this restriction, official permission from the company is required, which is issued through the Mi Unlock Tool utility.

The process starts by linking your Mi Account to your device, you need to log in to your phone's settings, select About Phone, and click on the MIUI version several times to activate the developer menu, then in the advanced settings, you need to find Mi Unlock Status and link your current device to your account, and then you need to wait a certain period of time, which is usually between 7 and 168 hours.

After the waiting time, you can start Mi Unlock on your computer, log in to your account and put your phone into Fastboot mode (clamping down the volume and power buttons at the same time). If all the conditions are met, the utility will allow you to unlock the bootloader, warning again that all data will be deleted.

⚠️ Warning: Unlocking the bootloader automatically voids the warranty on the device in some regions and resets all security settings, including theft protection.

Search and preparation of Fastboot firmware

The critical point is to choose the right version of the software. To roll back, you need Fastboot firmware, not Recovery. Recovery files have the.zip extension and are designed to be updated through the recovery menu, while Fastboot versions come in the form of.tgz or.zip archives, which, once unpacked, contain many files and scripts for direct writing to memory.

When searching for firmware on specialized resources (such as miui.com or xiaomifirmwareupdater.com), pay attention to the region of the device. Global firmware (Global) can not be rolled on the Chinese version (CN) and vice versa without complex manipulations to change the region. In addition, the version of Android 11 should be newer than the one that was on the device originally, but older than the current installed version to avoid compatibility errors.

Once the archive is downloaded, it must be unpacked into the root of the C disk or into any folder that does not contain Cyrillic characters or spaces, a requirement dictated by the features of the firmware scripts, which can incorrectly process the path to the file if it meets Russian letters.

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Always check the checksum (MD5 or SHA1) of the downloaded firmware. If the hash does not match the one listed on the site, the file is corrupted and its use can cause the device to fail.

Installation of an old version of Android

Once all the preparatory steps have been completed, you can start the installation directly. Launch the Xiaomi Flash Tool on behalf of the administrator. Press the Select button and specify the path to the folder where you previously unpacked the Fastboot firmware files. The program automatically reads the files and displays the firmware version in the window.

Next, you need to transfer the smartphone to Fastboot mode. To do this, turn off the device completely, and then press the volume down button and, holding it, connect the phone to the computer through USB-The screen should show a bunny in an orange jacket or a sign FASTBOOT. In the Mi Flash Tool, click the Refresh button and your device with its serial number should appear in the list.

At the bottom of the program window, select Clean all firmware mode. This option guarantees complete removal of the old system and installation of the new one from a clean sheet, which eliminates file conflicts. Do not choose the Clean all and lock option unless you are 100% sure of the compatibility of regions, since locking the bootloader on someone else's firmware will lock the device forever.

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After selecting the mode, press the "Flash" button, the recording process will begin, which can take from 5 to 15 minutes, during which time it is strictly forbidden to turn off the cable, turn off the computer or interrupt the program, after the process, the status will appear "Success", and the phone will automatically restart.

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Selecting Clear All mode is a must when downgrading. Trying to save data ("Save user data") when you downgrade Android will result in a cyclical reboot or system errors.

Primary setup and problem solving

The first launch after a system rollback always takes longer than usual, as Android performs application optimization and partition integrity check.Be prepared for the MI logo to hang on the screen for up to 10 minutes. Once downloaded, you will be greeted by a standard welcome menu, where you will select a language, connect to Wi-Fi and log into your Google account.

If you experience sensor, camera or communication errors after boot, it may indicate that the drivers are not installed correctly or that the partition persists is damaged. In most cases, reflashing in Clean all mode solves the problem, and it is also worth checking whether the system has updated some critical components in the background immediately after connecting to the network.

In rare cases, the device can go into an endless restart (bootloop). If this happens, you need to re-enter Recovery mode (pressing the power and volume button up) and reset (Wipe Data). If this does not help, you will need to repeat the firmware procedure through Fastboot with integrity check. USB-cable.

⚠️ Warning: If your phone says "Device is locked" after you've run it, and it doesn't boot, you may have blocked the bootloader when you're running an incompatible firmware, and only a service center with a programmer will help.

Back on a stable version of Android 11, it is recommended to immediately disable automatic system updates to avoid re-installing an unwanted version, this can be done through the developer settings or using special update-blocking applications.

Frequently Asked Questions (FAQ)