How to roll back the update on Android Xiaomi Redmi 9T: 3 working ways

Firmware updates on Xiaomi Redmi 9T usually improve performance, fix bugs and add new features. But what if after the upgrade the smartphone started to brake, quickly discharge or completely stopped working correctly? Recoiling to the previous version of MIUI is a difficult but doable task. In this article, we will analyze all the current methods of returning to the old firmware, assess their risks and give clear instructions for users with any level of training.

It's important to understand that rolling back an update is not just "unchange" but a complete flashing of the device, a process that requires preparation, backup and sometimes even unlocking the bootloader. We will look at the official and informal ways, including the use of Fastboot, Recovery and specialized utilities from Xiaomi. 9T.

If you've never been a smartphone firmware user, don't worry. We've broken it down into simple steps with visual cues and warnings of critical moments. The rule is, don't skip the checkout steps or ignore the requirements for the MIUI version. For example, rolling back from MIUI 14 to MIUI 12 may require additional manipulation of the bootloader.

Why You Might Need to Reverse Redmi 9T Update

Xiaomi’s current firmware isn’t always perfect, and here are the most common reasons Redmi 9T users are willing to roll back:

• 🐢 Critical performance drop: after the update, the smartphone begins to “lay”, applications open for a long time, and animation twitches. MIUI It can consume too many resources.
• 🔋 Accelerated battery discharge: some updates contain power management errors, which is why Redmi 9T discharged 4-5 clock instead of usual 12-15.
• 📵 Network problems: mobile Internet goes missing, 5GHz Wi-Fi is not catching, or calls are made, often due to modems in new firmware.
• 🔒 Blocking features: Xiaomi sometimes removes useful features in newer versions (for example, adjusting the color temperature of the screen or energy saving modes).
• 🚨 Critical bugs: from occasional reboots to inability to log in to settings. There are times when an update makes a smartphone completely inoperable.

According to the XDA Developers community, about 12% of Redmi 9T users experience serious problems after major MIUI updates, while Xiaomi’s official support rarely offers a solution other than “wait for the next patch,” rolling back the phone today.

⚠️ Attention: If your Redmi is 9T If you are under warranty, you may cancel the firmware.

Preparation for rollback: what to do before the firmware

Unprepared rollbacks can lead to data loss or “bricking” of the device.

Make a backup copy of all data|Check the current version of the firmware|Download the correct version MIUI kickback|Charge your smartphone at least 60%|Install drivers ADB/Fastboot PC-only|Prepare. USB-cable (original or quality)

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First thing you do is save all the important data. The rollback will reset the smartphone to the factory settings, so:

• 📁 Transfer photos and videos to your PC or cloud (Google Photos, Mi Cloud).
• 📱 Export contacts to the file VCF via the Contacts app.
• 🔑 Save passwords from your browser (use a password manager or export to Chrome).
• 🎮 Transfer game saving via Google Play or Mi Account.

Next, determine the current and target firmware versions.

1. Go to Settings → About Phone → MIUI version.
2. Write down the full build number (e.g., V12.5.3.0.RJQMIXM).
3. On MIUI Downloads, find the stable version for Redmi 9T (codenamed lime).

⚠️ Note: Do not download firmware from third sites! Use only official Xiaomi sources to avoid viruses or corrupted files. The firmware version must match the region of your device (Global, China, EEA).

To work with Fastboot or Recovery you will need:

• 🖥️ Computer running Windows 10/11 (for Mac/Linux Additional drivers are needed).
• 🔌 Original. USB-cable (cheap cables may not transmit data in Fastboot mode).
• 🛠️ Mi Flash Tool (for Fastboot), ADB Platform Tools (for Recovery).

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If you are not sure about the firmware version, use the Xiaomi ADB/Fastboot Tools utility – it will automatically determine the model and the current MIUI.

Method 1: Recovery (without unlocking the bootloader)

This is the safest method, but it only works if:

• ✅ Your Redmi. 9T has no unlocked loader.
• ✅ You're backing down on the version. MIUI, which is older than the current release by no more than 2 major releases (for example, with MIUI 13 on MIUI 12).
• ✅ You have access to the Recovery menu (clamping power). + Volume up when switched on).

Step-by-step:

1. Download the correct firmware file in.zip format for Recovery (not Fastboot!). For example, for the global version, it will be a file of the view miui_LIMEGlobal_V12.5.2.0.RJQMIXM_....zip.
2. Rename the file to update.zip and transfer it to the root directory of the smartphone’s internal memory (not to folders!).
3. Boot in Recovery: 1. Turn off your smartphone. 2. Press the Power and Volume buttons up for 10 seconds. 3. Release when the Mi logo appears.
4. Select the language (usually English or Chinese) and go to Install update.zip to System.
5. Confirm the installation and wait for the completion (5-10 minutes).
6. Select Reboot to System to restart.

If after the reboot, the smartphone hangs on the Redmi logo, reset via Recovery (Wipe Data → Wipe All Data). This will delete all user data, but return the functionality.

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The Recovery method is suitable for most users, but only works when rolling back to close versions of MIUI. A radical downgrade (e.g., from MIUI 14 to MIUI 11) will require a Fastboot.

Method 2: Recoil from Fastboot (for power users)

This method allows you to roll back on any version of MIUI, but requires an unlocked bootloader and work with the command line. If you have never used Fastboot, you better refer to the first method or contact the service center.

Requirements:

• 🔓 Unlocked bootloader (if not unlocked – see the instructions below).
• 🖥️ Installed Mi Flash Tool and drivers ADB/Fastboot.
• 📄 Fastboot firmware in.tgz format (not to be confused with Recovery!).

Step-by-step:

1. Unlock the bootloader (if not already done): How to unlock the bootloader on Redmi 9T 1. Link the Mi Account to the device in Settings → Additional → Developer → Mi Unlock Status. 2. Download Mi Unlock Tool from the official website. 3. Download to Fastboot (press Power + Volume Down). 4. Connect the smartphone to the PC and follow the instructions in the utility. Attention: Xiaomi may require a wait of up to 720 hours (30 days) for a new unlock!
2. Download the Fastboot firmware from the official website. Unpack the.tgz archive into a folder without Cyrillic characters on the way.
3. Load into Fastboot mode: 1. Turn off your smartphone. 2. Press Power + Volume down until the hare appears in the eardress cap.
4. Connect your smartphone to your PC and check for device detection by the command: fastboot devices must display the serial number of your Redmi 9T.
5. Run Mi Flash Tool: 1. Select the folder with the unpacked firmware. 2. Specify Clean All mode. 3. Press Flash and wait for completion (10-15 minutes).
6. Reboot your smartphone with the command: fastboot reboot

⚠️ Note: If the Mi Flash Tool is running an “anti-rollback check” error during the firmware process, it means you are trying to install an older version. MIUI. In this case, a special patch or firmware will be required through EDL-The mode (only for experienced users!).

Critical information: On the Redmi 9T with a Snapdragon 662 processor, a rollback below MIUI 12.0.1.0 may cause the modem to fail (no network), in which case you will need to firmware through TestPoint or replace the communication module.

Method 3: Using the XiaomiTool V2 utility (alternative method)

For those who don’t want to mess with manual commands, there’s a semi-automatic solution – the XiaomiTool V2 utility. It supports Redmi 9T (codename lime) and allows you to roll back on any compatible version of MIUI.

Advantages of the method:

• 🎛️ Automatic definition of the model and available firmware.
• 🔄 The possibility of rollback without deep knowledge of Fastboot.
• 🛡️ Built-in version compatibility check (anti-rollback protection").

Instructions:

1. Download XiaomiTool V2 with XDA Developers and install.
2. Boot in Fastboot (as in Method 2) and connect your smartphone to your PC.
3. Start the utility and select your model (Redmi 9T / lime).
4. In the Downgrade section, select the target version of MIUI from the list of compatible versions.
5. Press Flash and wait until it's done. The utility will download the firmware itself and execute all the commands.

Once the firmware is in place, the smartphone will automatically restart. The first launch can take up to 20 minutes - don't interrupt the process!

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If XiaomiTool V2 Does not see your device, try reinstalling drivers through the Mi Flash Tool or using another one USB-port (preferably) USB 2.0).

Typical rollback mistakes and their solutions

Even with the correct following of the instructions, errors can occur, and here are the most common problems and ways to solve them:

If the phone does not turn on after rollback or gives an error DM-Verity corruption, try:

1. Download to Recovery and run Wipe Data.
2. If it doesn’t work, then swipe your smartphone again with the Clean All and Lock mode in the Mi Flash Tool.
3. As a last resort, use it. EDL-Mode (requires an authorized Xiaomi account).

⚠️ Note: If you have been missing after the retraction IMEI or the camera stopped working, this means that the firmware is not compatible with the hardware revision of your Redmi 9T. In this case, you need to download the original version. MIUI for your area or contact a service center.

What to do if the rollback does not help: alternative solutions

If even after a successful rollback, problems persist, consider these options:

• 🔄 Factory reset: Sometimes bugs are left behind by snippets of old data. Perform a full reset to Settings → Additionally. → Recovery and discharge.
• 🛠️ Custom firmware installation: For example, Pixel Experience or LineageOS may be more stable than stock MIUI. Requires an unlocked bootloader and experience with TWRP.
• 📱 Replacement of hardware components: If the speaker, microphone or sensors stop working after the upgrade, the problem may be physical damage.
• 📞 Contacting the service center: If the smartphone is warranty, it is better to use official support. Xiaomi sometimes admits the blame for problematic updates and repairs devices for free.

To install custom firmware on Redmi 9T you will need:

1. Unlock the bootloader (as described above).
2. Install TWRP Recovery with Fastboot: Fastboot Flash Recovery twrp_lime.img fastboot boot twrp_lime.img
3. Download compatible firmware (e.g., XDA) and download it via TWRP.

Remember: custom firmware deprives you of official Xiaomi support and may contain bugs. Before installing, be sure to check the feedback of other Redmi 9T users about a particular build.

FAQ: Frequent questions about rollback updates on Redmi 9T