Xiaomi’s firmware rollback from MIUI 12 to MIUI 11: secure downgrade without data loss

Why do users return from MIUI 12 to MIUI 11?

The switch to a new firmware version is not always up to date. Many Xiaomi smartphone owners, after upgrading to MIUI 12, experience a slowdown, increased battery consumption or inconvenience in the interface, especially for models with limited hardware resources, such as the Redmi Note 8 Pro, Mi 9 Lite or Poco X3, where the new shell may work less stable than the previous version.

Firmware rollback is not as easy as installing an update. The manufacturer does not provide official tools for downgrade, so users have to use workarounds: unlock the bootloader, manual firmware via Fastboot or Recovery, and sometimes a full reset. In this article, we will discuss all the steps of the rollback from MIUI 12 to MIUI 11, including preparing the device, choosing the right firmware and recovering data after the procedure.

It is important to understand that a downgrade can result in a loss of warranty (if the device is still warranty) or temporary system instability, but with the right approach, the risks are minimal, and the main thing is to follow the instructions and not miss critical steps, such as backing up or checking firmware compatibility.

Preparation of the device for rollback of the firmware

Before you start downgrading, you need to perform several mandatory actions, neglecting them can lead to a "brick" (inoperability) of the device or loss of important data.

• 📱 Create a backup through Settings → The phone. → Backup or use Mi Cloud (if sync is enabled). Pay special attention to contacts, SMS, Photos and application files.
• 🔋 Charge the battery to minimum. 60-70%. The firmware process may take up to 30-40 minutes, and the battery discharge at this point is fraught with failures.
• 🔗 Download drivers for your Xiaomi model on your PC. Without them, your computer won’t be able to recognize your device in Fastboot mode.
• 📥 Prepare the firmware. Make sure you download the exact version. MIUI 11 that is suitable for your model and region (Global, China, EEA).

Also check if the bootloader is unlocked on your device, and if it isn’t, you’ll have to unlock it through the official Mi Unlock Tool, which requires a tied Mi Account and a wait of 7-15 days (unless the bootloader has never unlocked before).

⚠️ Note: If you previously blocked the bootloader after unlocking (e.g. via the fastboot oem lock command), re-unlocking can take up to 30 days.

To check the bootloader status, turn off the device, then press Volume Down + Power to log into the Fastboot. Connect the smartphone to your PC and type in the command line:

fastboot oem device-info

If you see Device unlocked: true in the answer, the bootloader is unlocked. If false, you will need to unlock.

Created a backup of all data|Battery charged at 70%+|Download drivers and Mi Unlock Tool|Firmware MIUI 11 compatible with the model|Uploader status checked-->

Choosing the Right MIUI 11 Firmware

One of the most critical steps is choosing the right version of MIUI 11. Installing incompatible firmware can lead to a hard brick, so take this step as carefully as possible.

Firmware for Xiaomi is divided into several types:

• 🌍 Global is an international version with support for Google services, suitable for most users.
• 🇨🇳 China – Chinese version without Google services, but with additional features for the local market.
• 🇪🇺 EEA — European version similar to Global, but with some limitations (e.g. no Call Recorder).
• 🛠️ Developer is a developer test version, it may contain bugs, but it's updated frequently.

To find out the current firmware version, go to Settings → About Phone → MIUI version. Pay attention to the model code (e.g. m1908c3xg for Redmi Note 8 Pro) and region (Global, China, etc.). Download the firmware with the same model code and region!

Download the firmware only from official sources:

• 🔗 Official website MIUI Downloads
• 🔗 Xiaomi Firmware Updater Repository (for older versions)

Never use firmware from unverified forums or torrent trackers – they may contain malware or be corrupted.

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If you are unsure about the firmware choice, check its hash (MD5) after downloading. Compare it to the official value on MIUI Downloads, which ensures that the file is not corrupted.

Firmware Recovery: Fastboot vs Recovery

There are two main methods of installing old firmware: Fastboot and Recovery, each with its pros and cons. Let's take a closer look at them.

Method 1: Fastboot Firmware (recommended)

This is suitable for most Xiaomi devices and is considered more reliable, since the firmware is installed directly in the device’s memory, but it requires an unlocked bootloader and command line work.

Pros:

• ✅ More stable process (less risk of error)
• ✅ Suitable for recovery of "bricked" devices
• ✅ Allows you to flash a complete image of the system

Cons:

• ❌ Requires unlocking the loader
• ❌ You need skills to work with ADB/Fastboot
• ❌ Complete data reset (wipe required)

Method 2: Firmware through Recovery (TWRP)

This is a good method if you have a customized recaveri (TWRP) installed, which allows you to save some data, but it's less reliable for a downgrade.

Pros:

• ✅ User data can be saved (with the right backup)
• ✅ No need to connect to a PC (if the firmware is on the SD-map)
• ✅ Faster than Fastboot.

Cons:

• ❌ Risk of errors in case of firmware incompatibility
• ❌ Requires established TWRP
• ❌ Not all devices support this method for downgrade

⚠️ Note: If you choose Recovery, but your device does not support downgrade through it (e.g., Redmi Note 10 with dynamic partitions), you risk getting a bootloop (infinite reboot.

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For most devices, Xiaomi is recommended to use the Fastboot method, as it ensures that the firmware is installed correctly even when switching to an older version.

Step-by-step: rollback via Fastboot

If you have chosen the Fastboot method, follow this instruction, make sure you have the bootloader unlocked, the correct firmware downloaded, and the drivers installed.

Step 1. Preparation of firmware

Downloaded archive with firmware (.tgz or.zip) must be unpacked into a folder on the disk C:\ (for example, C:\MIUI11). There's gotta be a file inside. flash_all.bat (for Windows or flash_all.sh (for Linux/Mac).

Step 2: Transfer the device to Fastboot mode

1. Turn off your smartphone.
2. Press Volume Down + Power and hold for 5-10 seconds until the Fastboot logo appears (the Mi Bunny robot labeled FASTBOOT).
3. Connect the device to the PC through USB-cable.

Step 3. Starting the firmware

1. Open the folder with the unpacked firmware.
2. Launch the file. flash_all.bat (double-click).
3. Wait until the process is complete. The device will restart automatically.

If the script does not start, use manual commands:

fastboot flash boot boot.img


fastboot flash recovery recovery.img




fastboot flash system system.img




fastboot flash vendor vendor.img




fastboot flash product product.img




fastboot flash dtbo dtbo.img




fastboot flash vbmeta vbmeta.img




fastboot erase userdata




fastboot reboot

⚠️ Attention: The fastboot erase userdata team completely clears the internal memory! If you don't backup, all data will be lost.

Step 4. First setup

Once you reboot, the device will be as new as it is, you will need to go through the initial setup, restore data from the backup (if you have one), and check the system's health. If there are errors (for example, a bootloop), repeat the firmware or try another method.

Data recovery and problem solving after downgrade

After a successful firmware rollback, you have to restore the data and check the device's health.

• 📲 Backup recovery. Use Mi Cloud or local backup (if it was created through Mi Backup). Note that some applications may not recover correctly, but will have to be manually reinstalled.
• 🔄 Check for updates. After downgrad, turn off automatic updates in Settings → The phone. → Update the system, otherwise the device may be updated to MIUI 12.
• 🛠️ Diagnose errors: If the smartphone is unstable (for example, spontaneously restarts), reset to factory settings via Settings → Additionally. → Recovery and discharge.

Frequent problems after downgrad and their solutions:

If you notice that the device is running slower than before, try:

• 🧹 Clear the cache via Recovery (Wipe) → Wipe Cache).
• 🔄 Disable animations in Settings → Additionally. → For developers (install Windows animation) = 0.5x).
• 📵 Remove unnecessary apps and disable autoboot via Security → Auto-start.

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If photos or contacts are missing after a downgrade, check the MIUI/Backup/AllBackup folder on internal memory. Sometimes backups are saved there automatically.

How to Avoid Automatic Upgrade to MIUI 12

After a successful firmware rollback, it is important to prevent a re-upgrade to MIUI 12.

• 🚫 Turn off automatic update check: Go to Settings → The phone. → Update system. Click on three dots in the top right corner and select Settings. Turn off Auto Boot via Wi-Fi.

Block Update Servers

hosts

1. Install the AdAway app or any hosts editor.
2. Add the lines: 127.0.0.1 update.miui.com 127.0.0.1 data.miui.com
3. 📵 Disable the update service through ADB: adb shell pm disable-user --user 0 com.android.updater (developer rights and enabled debugging required) USB).

Decisions:

• Sweat modem and nvram separately through Fastboot.
• Use the SN Writer Tool to restore IMEI (NV backup required).
• If nothing helps, go back to MIUI 12 and re-roll with another firmware.