The Redmi 8T has proven itself as a reliable device with excellent autonomy, but over time users often face the need to reinstall the operating system. This may be due to the transition to Global ROM to get Russian language and Google services out of the box, or with the desire to upgrade to a more recent version of Android, which the manufacturer has already stopped releasing officially.
Before you take action, you need to be clear about the risks. Any software interference has the potential to turn the device into a brick if you interrupt the power supply or use incorrect files. However, if you prepare all the necessary tools and carefully read the instructions, the probability of success is close to one hundred percent. In this article, we will discuss all the steps from unlocking the bootloader to the final configuration of the system.
It is worth noting that the Redmi 8T (codename willow) has several modifications, and it is crucial not to confuse them when choosing a firmware file. An error at this stage can lead to the failure of communication modules or a complete failure of the touch screen.
Preparation of the device and assembly of tools
The success of the operation depends on the quality of preparation 90%. 8T, fit USB-cable (preferably original or certified, capable of transmitting data, not just charging) and a Windows computer. ADB Fastboot, which is often part of the platform SDK Platform-tools by Google.
You will also need a firmware archive. There are different types of packages for this model: Recovery (update via the phone menu) and Fastboot (complete firmware through the computer). For a clean installation, we will use the Fastboot version, which has the.tgz extension, not.zip. You should only download files from trusted resources, such as the official website miui.com or authoritative forums like XDA-Developers.
⚠️ Warning: Before starting all procedures, be sure to back up important data. The Fastboot firmware process will completely destroy all files, photos and contacts on the internal drive of the device.
Remember to charge your smartphone battery to at least 60-70%, the process of recording energy-intensive memory sectors, and a sudden power outage at a critical moment can disrupt the structure of the boot partitions, and also make sure that your computer has free space on the system disk to unpack firmware archives, which can weigh up to 3-4 GB.
Unlocking the bootloader (Bootloader)
Xiaomi blocks the bootloader of its devices by default, which prevents the installation of unofficial software and complete partition reset.To remove this restriction, you will need the Mi Unlock Tool utility and the Mi Account associated with the device. The process is not instantaneous: after submitting an application in the phone settings, you may need to wait from 7 to 15 days (168-360 hours).
To activate the developer mode, you need to click on the build number several times in the Settings → About Phone menu. Then, in the Developer menu that appears, you should activate the "Debug by USB" and "Factory Unlock" items. It is after the second item is turned on that the system will request an account link and warn about the risks.
☑️ Checking before unlocking
After the wait period expires, you need to turn off the phone and enter Fastboot mode, holding the Volume Down and Power buttons simultaneously. Connecting the device to the PC, launch the unlock utility. If all data is entered correctly, the Unlock button will appear, pressing which will start the process. The smartphone screen will show the progress bar, and after completion, the device will restart and clear user data.
What if Mi Unlock says "Couldn't verify device"?
Finding and Choosing the Right Firmware
The most critical step is choosing a compatible file. Redmi 8T is codenamed willow. It is important not to confuse it with Redmi 8 (olive) or Redmi 8 Pro (ginkgo), as the firmware from these models is incompatible and will lead to hardware conflicts. On the firmware aggregator site or in the MIUI archive, always check the "Device codename" field.
There are two main regional options: Global (international) and China (Chinese). For most users outside China, only the Global version is suitable, since it already has Google services built in, multilinguality (including Russian) and notifications working correctly. Chinese firmware requires additional manipulations to install Google Play and may have problems with LTE frequencies in European networks.
| Parameter | Global ROM | China ROM | Recovery ROM |
|---|---|---|---|
| Language of the system | Multilingual (there is Russian) | Chinese, English | Depends on the version. |
| Google Services | Built-in | Not present (installation required) | Depends on the version. |
| File format | .tgz (Fastboot),.zip (Recovery) | .tgz,.zip | .zip |
| Region of work | The world | China (requires adaptation) | Depends on the version. |
When downloading, pay attention to the Android version and MIUI. For Redmi. 8T The current versions are MIUI 11, 12 and custom builds based on Android 10/11. The newer (officially) model is usually not updated, so enthusiasts often switch to custom firmware such as LineageOS or Pixel Experience if they want a fresher Android.
Firmware process through Fastboot
Fastboot is the most reliable method of firmware, and it fixes most software errors. Once you unpack the firmware archive (.tgz file) on your computer, you'll find a startup script inside the folder. For Windows, it's a file. flash_all.bat or flash_all_lock.bat.
Put your smartphone into Fastboot mode (clamping Volume Down + Power) until you see a hare in your headphones or the words FASTBOOT on your screen. Connect your phone to your PC. Open the folder with the unpacked firmware and launch the corresponding bat file. The command line begins the process of writing partitions, which will be displayed as percent and technical logs.
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot rebootIt can take anywhere from 5 to 15 minutes. It's absolutely impossible to disconnect the cable or interrupt the computer. If you see green Finished in the log, it's a success. If you see a red line with an error, such as error: Couldn't match device, check the drivers or cable.
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Use it. USB-port located on the motherboard behind the system unit (for PCs) rather than on the front panel or through the USB-This will provide stable voltage and data transfer, which is critical when firmware.
Install firmware through Recovery (without PC)
If your computer is not available or you want to simply upgrade the MIUI version without completely clearing the data (although cleaning is recommended), you can use Recovery mode. To do this, download the firmware file with the.zip extension (Recovery ROM) and place it in the root of the phone's internal memory.
Reboot the device to Recovery mode by clamping Volume Up + Power. In the menu that appears, select the language (usually available in English and Chinese) and press Wipe Data, then Wipe All Data. This is a must-do step when changing the firmware region (for example, from China to Global), otherwise the phone will go into a cyclic restart (bootloop).
Once cleaned, select Install (or Install Update.zip), find the downloaded archive and confirm the installation. The system will check checksums and start the upgrade. This method is easier, but it does not allow you to downgrade the Android version or fix damaged partitions of the bootloader if they are already damaged.
⚠️ Note: When you switch from one regional version to another (Cross-region update), for example, from Global to China or vice versa, be sure to do a complete cleanup (Wipe All Data). Ignoring this rule will lead to a software conflict and the inability to boot the system.
Solving mistakes and problems
Even if you follow the instructions carefully, you can get a lot of trouble, and one of the common problems is the "Can't verify update" error when you try to install Recovery ROM, which means you try to install a firmware version older than the one you're using now, or you change the region without the bootloader unlocked, so you can either unlock Bootloader or use a Fastboot method with a full cleanup.
Another common situation is hanging on the logo. MI (Bootloop if the phone doesn't load more 10 Just try to log in to Recovery and do a Wipe Data reset. If that doesn't work, just re-flashing through Fastboot using the command will help. flash_all.bat, Who will recreate all the sections.
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Most of the mistakes in the firmware Xiaomi Redmi 8T Not with the file itself, but with the use of low-quality USB-cable or port, or with an attempt to update without first unlocking the bootloader.
If your computer doesn't see your phone in Fastboot mode, check Windows Device Manager"QHSUSB_BULK" Or "Unknown Device." In this case, you need to manually update the driver, selecting from the list of Qualcomm or Xiaomi. USB Driver, try another one too. USB-cables, as many cables are only for charging and do not transmit data.