Firmware rollback on Xiaomi Redmi Note 7: full instruction with unlocking the bootloader

Xiaomi Redmi Note 7 (codename lavender) remains a popular smartphone even years after its release, but new versions of MIUI do not always work steadily. Bugs, brakes or failed updates force users to look for a way to return the previous firmware. In this article, we will analyze all working methods of rollback — from the official downgrade through the Mi Flash Tool to manual firmware through TWRP, taking into account the nuances of unlocking the bootloader and saving data.

It's important to understand that a firmware rollback on Xiaomi isn't just an old version. The company is actively blocking downgrades through standard methods, so we'll have to use workarounds. We'll look at different scenarios: when to save user data, when a clean installation is required, and what to do if a smartphone turns into a brick after a failed firmware, and we'll also look at a unique anti-rollback check bug on the Redmi Note 7 that can lock the device if it rolls back improperly.

Preparing for a rollback: what you need to know before starting

Before you start rolling back, check the current MIUI version and device model. Go to Settings → About Phone.

• 📱 The code name of the model must be lavender (for the global version) or lavenderin (for the Indian version).
• 🔢 Version. MIUI — for example, MIUI 14.0.5.0 (last digit indicates region:.0 - China,.5 - global).
• 🔒 bootloader status – whether it is unlocked (checked by the fastboot oem device-info team).

If the bootloader is locked, you must unlock it through the official Mi Unlock Tool, without which you can only roll back on the newer version of MIUI, which is pointless.

• 📉 A rollback to a version older than 2-3 months may cause problems with Google services (for example, errors when logging in to an account).
• 🔄 Antirollback is a Xiaomi protection that blocks the rollback on too old firmware. On Redmi Note 7, it works when trying to install MIUI older than 11.0.2.0.
• 📡 IMEI and the serial number can be reset with a clean installation – save them in advance (for example, through an app). MTK Engineering Mode).

If your device was purchased in China (the domestic version), a rollback to global firmware may result in network loss due to differences in modem files. modem_st1 and modem_st2 separately.

Method 1: Recoil through the Mi Flash Tool (official method)

This is the most reliable way, but it requires an unlocked bootloader and a complete data reset, suitable for returning to any version of MIUI except those blocked by anti-rollback.

Steps:

1. Download firmware from MIUI Downloads. Choose a Fastboot ROM for your model (lavender).
2. Unpack the archive in a folder without Cyrillic characters (for example, C:\MIUI\lavender).
3. Install drivers for Xiaomi (you can download from Mi Flash Tool or through Xiaomi Driver Installer).
4. Launch the Mi Flash Tool, connect the phone in Fastboot mode (clip Volume Down + Power when the device is off).
5. Select a firmware folder and press Refresh. The device should be defined as COMX.
6. Press Flash and wait until it is completed (10-15 minutes).

If the Mi Flash Tool gives you an anti-rollback check error, you're trying to install a firmware that's too old.

• Try the version later (for example, instead of MIUI 10, take MIUI 11.0.3.0).
• Use TWRP to bypass the anti-rollback (see Method 3).

Once the firmware is successful, the phone will automatically restart. The first turn on can take up to 10 minutes - don't interrupt the process!

Method 2: Recoil through OTA-packet (without data loss)

If you want to roll back to the previous version of MIUI that was received by air (OTA), you can try installing it manually.This method does not require unlocking the bootloader, but only works for transitions between neighboring versions (for example, from 14.0.5.0 to 14.0.4.0).

Instructions:

1. Download the full OTA-The package (not incremental!) for your model from the Xiaomi Firmware Updater website.
2. Place the file in the root of the phone’s internal memory (e.g, /sdcard/download_rom).
3. Open the Updater app, click on the three dots in the upper right corner and select Select the firmware file.
4. Specify the downloaded file and confirm the installation.

⚠️ Warning: If after the reboot the phone hangs on the logo MI, signifier OTA-The package is incompatible with your current firmware, in which case you will have to use the Mi Flash Tool or TWRP.

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If you can't find OTA-Package for your version, try downloading it through a Telegram bot MIUI Updates Tracker.It provides direct links to official updates.

Method 3: Recoil through TWRP (for power users)

If the first two methods fail, the TWRP customization process is used to:

• 🔄 Bypass the anti-rollback (provided the correct firmware is selected).
• 📦 Save data (if not formatted) /data).
• 🛠 Install modified firmware (e.g. xiaomi.eu).

Preparation:

1. Unlock the bootloader (see section below).
2. Download TWRP for lavender from the official website twrp.me.
3. Download firmware in.zip format (for example, from xiaomi.eu or the official website).

Installation of TWRP and firmware:

1. Turn your phone into Fastboot mode (Loudness down + Power).
2. Connect to your PC and execute the command: fastboot flash recovery twrp-3.7.0_9-0-lavender.img fastboot boot twrp-3.7.0_9-0-lavender.img
3. In TWRP, backup Boot, System, Data (click Backup)
4. Press Install, select the downloaded firmware and confirm the installation.
5. Once completed, run Wipe → Format Data (if you need a clean installation) and restart.

If your phone doesn't boot after you've been firmwareed through TWRP, try:

• Install Magisk for Google Services to work properly.
• Switch vendor and firmware separately (you can download Xiaomi Firmware Updater).

How to unlock the bootloader on Redmi Note 7

Without unlocking the bootloader, the firmware can only be rolled back to the new version, which is meaningless. The process takes 7 days of waiting (if the Mi Account is not tied to the device) or is instantaneous (if tied).

Step-by-step:

1. Link your Mi Account to your phone: Settings → Xiaomi Account → Sync.
2. Enable USB Debugging and OEM Unlocking in Settings → For Developers.
3. Download Mi Unlock Tool from the official website.
4. Launch the tool, log in to your Mi Account and connect your phone in Fastboot mode.
5. Press Unlock. If a waiting message appears, wait for the specified time (usually 168 hours).

⚠️ Warning: Once the bootloader is unlocked, all data on the phone, including photos and apps, will be reset, as will some features (e.g. Mi Pay or Widevine). L1 for HD-The streaming may stop working.

Solving problems after rolling back firmware

Even if you pull back successfully, you can make mistakes, and let's look at the most common ones and how to fix them.

If the Root access is lost after the rollback, it must be installed again via Magisk:

1. Download the latest version of Magisk from GitHub.
2. In TWRP, select Install and swipe Magisk-v26.4.zip.
3. Restart and check Root through the Magisk Manager app.

How to avoid mistakes when rolling back: tips from experts

To minimize the risks, follow these guidelines:

• 🔍 Check the compatibility of the firmware with your model (lavender vs lavenderin).
• 📡 Use stable versions MIUI (Avoid weekly builds for downgrade).
• 🔋 Charge your phone at least 70% before the firmware.
• 💾 Create a backup through TWRP or Mi PC Suite.
• 🔗 Do not interrupt the process – even if the phone seems to be getting stuck (wait for 20-30 minutes).

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If you’re rolling back from Android 10 to Android 9, make sure to run firmware and vendor separately. Otherwise, the camera and sensors may not work properly.

If you are not confident in your abilities, it is better to contact the service center.Incorrect rollback can lead to a complete loss of IMEI or locking the device (for example, due to an anti-rollback error on the Redmi Note 7).

FAQ: Frequent questions about firmware rollback