Xiaomi's mobile devices are famous for their functionality, but sometimes users face the need to change the regional version of the firmware or restore the system after a failure. 8T, Snapdragon-based 665, It's still popular, and it's a flashing experience that's relevant to anyone who wants to get a global shell or upgrade to a newer version of Android, and it takes care, but it takes no more if you're doing it right. 20-30 minute.
Before you start taking action, you need to clearly understand that flashing is a replacement of the software of the device, which entails the complete removal of all user data. Backing up contacts, photos and documents is a mandatory step, ignoring which will lead to irretrievable loss of information. In this article, we will discuss all the steps from unlocking the bootloader to the final installation of the system image through the computer.
Preparation of equipment and software
Success of the operation 90% It depends on the quality of the training, you'll need the Redmi smartphone. 8T, fit USB-cable (preferably original or certified, capable of transmitting data, not just charging) and a Windows computer. ADB/Fastboot, which are often installed automatically along with the firmware utility, but it is better to be ready for manual installation.
The key tool for this model will be the Mi Flash Tool, the official Xiaomi utility for Snapdragon chip-based devices, which you can download exclusively from trusted resources or the official MIUI forum to avoid malicious code, and you will need a firmware file in.zip format that you will need to unpack before starting work.
⚠️ Note: Using unverified firmware assemblies from dubious sites can lead to the inoperability of the communication module or the appearance of system errors that cannot be fixed software.
Check your device's battery power. To do the procedure, the charge level should be at least 60%, and ideally be fully charged. Interrupting the power supply at a critical point in the recording of system partitions can turn the phone into a "brick", the recovery of which will require the programr to solder.
Unlocking the bootloader (Bootloader)
The most difficult and longest step for many users is unlocking the bootloader. The bootloader is a program that runs to the operating system and checks the integrity of the software. It is blocked by the manufacturer by default for security reasons, which does not allow you to install modified images or firmware from other regions.
To unlock, you need to link your Mi Account to your device and apply through a special Mi Unlock app on your computer. Once you apply, the system will require a wait. The standard waiting period for a Redmi 8T model is usually 7 to 15 days (168-360 hours).
The unlocking process is as follows:
- 📱 Turn on the developer mode by clicking 7 times on the build number in the menu About phone".
- 🔗 In the menu "For developers" select "Mi Unlock Status" and link the account.
- 💻 Launch the Mi Unlock Tool on PC, log in to the same account and put your phone into Fastboot mode (clamping the power and volume buttons).
- 🔓 Press the Unlock button in the program and wait for the process to be completed.
Once successfully unlocked, the device will automatically clear all data (Factory Reset) as a security measure to prevent the new owner from accessing the previous user's data. At this point, the phone will reboot and you will see the open lock icon when turned on.
Finding and Choosing the Right Firmware
Choosing the right firmware file is a critical moment. Redmi 8T has different versions: Global, China, Russia, India, etc. It's important to understand the difference between the types of firmware: Recovery (update via phone menu) and Fastboot (complete firmware reflash via PC), and we need a Fastboot image, because it allows you to change the region and do the complete partition cleaning.
Firmware files have a specific naming structure, for example, a file may be called a name. tulip_global_images_V12.0.3.0.QGYMIXM_20201123.0000.00_10.0_global.zip. The name encrypts the model, region, Android version and build date, and downloads the firmware from reputable sources such as miui.com or xiaomifirmwareupdater.com.
Comparison of firmware types for Redmi 8T:
| Type of firmware | Method of installation | Data retention | Change of region |
|---|---|---|---|
| Recovery | Through the update menu | Yeah (usually) | No (sam-region only) |
| Fastboot | Through the Mi Flash Tool | No (full reset) | Yes. Global. ↔ China) |
| Custom (TWRP) | Through Recovery. | Depends on the user. | Yes. |
Where can I find the exact code name of the model?
After downloading the archive, it must be unpacked into the root of the disk or into a folder with a short path, for example, C:\mi_flash\. Long paths with Cyrillic symbols can cause errors in the Mi Flash utility.
The process of firmware through the Mi Flash Tool
When all the (preparatory) work is done, you can start the process. Run the Mi Flash Tool on behalf of the administrator. Press the Refresh button to make sure the program sees the drivers, although the phone does not need to be connected yet. Then click the "Select" button and specify the path to the unpacked firmware folder.
☑️ Checklist before the start of the firmware
Put your smartphone in Fastboot mode. To do this, press the device off with Power and Volume Down buttons at the same time. The screen will show an image of a rabbit repairing an android, or the inscription FASTBOOT. Connect the phone with a cable to your computer. In the Windows Device Manager, Android Bootloader Interface should appear in the Android Devices section.
In Mi Flash, click "Refresh" again. If your device's serial number appears on the list, the link is established. At the bottom of the window, select firmware mode. Clean all is the best option for a clean installation. It completely erases all partitions and writes new ones. The Clean all and lock option also reflashes the phone, but also blocks the bootloader back, which can be useful for selling the device, but it is dangerous if you accidentally install firmware in the wrong region (for example, instead of China Global).
⚠️ Warning: Never use the "Clean all and lock" option if you change your firmware region (e.g. from China to Global) and this will result in a hard block device (Hard Brick), which can only be removed through an authorized service center.
Press the Flash button and be patient. It takes 200 to 600 seconds. It's strictly forbidden to touch the cable, turn off the computer, or interrupt the program. The progress bar will be filled in green. When the State column is completed, the word "success" will appear, and the phone will automatically restart.
Solving Typical Errors and Problems
Even if you follow the instructions strictly, you can get errors, and one of the most common is Error: Miss matching image and device, which means you're trying to flash a firmware that's not designed for this model, or you've chosen the wrong lock mode. Always double-check the code name (tulip) and region.
Another common problem is the Error driver error: Can't receive hello packet or the device is not detected at all.
- 🔌 Replace USB-cable for high-quality, short and without damage.
- 💻 Connect the cable directly to the motherboard port (behind the PC), bypassing USB-hubs and front panel of the body.
- 🔄 Reinstall Qualcomm drivers HS-USB QDLoader 9008 manually via Device Manager.
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If your computer can't see your phone in Fastboot mode, try pressing the volume button up or down immediately after you plug in the cable while the screen with the hare is on, sometimes reconnecting in EDL mode (clamping both volume buttons and power on the phone turned off) helps.
If the firmware process is stuck at some stage (e.g. 50% or 90%) and does not move for more than 10 minutes, there is likely a failure of the sector recording, in which case you will have to interrupt the process, turn off the phone (holding the Power for 10-15 seconds) and try to flash again, perhaps by changing the USB port or the version of the Mi Flash Tool (often older versions, such as 2018 or 2020, help).
First start and initial setup
After a successful firmware run, the first run of Redmi 8T can last longer than usual - from 5 to 10 minutes. Don't panic if you see the MI or Android logo on a black screen. The system optimizes applications and creates the necessary partitions. After the welcome screen appears, select a language and connect to Wi-Fi.
An important step is the verification IMEI. Type *#06# into dialer and make sure both are displayed. IMEI (If the model is two-sim model, and they match the ones on the box or under the battery (if it were removed). IMEI or zero values indicate damage to the partition EFS, Requires complex recovery through engineering utilities.
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After the first flash, be sure to update all system apps through Google Play and check for new updates in the About Phone menu, as the firmware image may have been released months ago.
Now your Xiaomi Redmi 8T runs on a clean, fast system, and it is recommended that you back up your new settings immediately to your Google account so that in case of future experiments, recovery can be as painless as possible.