Redmi smartphones are deservedly popular due to the affordable price and the possibility of deep customization, but owners of the Redmi 6A model often face the need to reinstall the operating system. This can be caused by the desire to change the Chinese firmware to global, the need to restore the device after a failed experiment or simply upgrade to a fresher version of MIUI, which the manufacturer stopped producing officially. The process of replacing software on this device requires care, but with all the steps it is quite accessible even for beginners.
Before you start taking action, you need to clearly understand which version of the operating system you want to get in the end. Global version supports all the necessary languages, including Russian, and has pre-installed Google services, which is critical for comfortable use. The Chinese version (China) often gets updates faster, but lacks many localized features and may contain unnecessary software. Firmware is a radical method that will completely clean up the internal memory of the device, so preparation is a key stage of success.
In this article, we will take a look at all the preparation steps, tools and step-by-step algorithms for different scenarios, learn how to unlock the bootloader, what drivers to install on the computer, and how to avoid common mistakes that turn the phone into a “brick”. A critical condition for all methods is the availability of original USB-At least 60% of the battery and cable are charged, and ignoring this requirement can cause data recording interruptions and damage to system partitions.
Preparation of the device and the workplace
The success of the operation depends on the quality of preparation, so do not neglect to check the hardware and software. You will need a computer running Windows, as most utilities for working with Xiaomi are optimized for this platform.
The first step is to back up all the important data, because all the information will be permanently deleted during the process. Use built-in MIUI tools or third-party cloud services to save contacts, photos and documents. Then activate the developer mode by going to Settings → About Phone and quickly clicking on the MIUI version seven times.
Further on the Advanced Settings menu → For developers, you should enable USB debugging and USB installation permission. These options allow the computer to interact with the system partitions of the smartphone at a deep level. Without activating these functions, no utility will be able to recognize the device in the desired mode.
☑️ Checklist for reflashing preparation
Unlocking the bootloader (Bootloader)
Xiaomi’s official policy requires that the bootloader be unlocked before installing third-party or global firmware, a security mechanism that prevents unauthorized interference with the system, but for enthusiasts it becomes the first obstacle, requiring the binding of the Mi Account account to the device and obtaining special permission from the company’s servers.
First, you need to install the Mi Unlock Tool app on your computer and log in to your account, and then on your smartphone, you need to select the “Truckloader Status” item on the developer menu and link the device to your account, and then you need to wait 7 to 168 hours, during which time the server checks the device for compliance with security rules.
⚠️ Attention: The unlock process completely erases all data from the phone, so re-create a backup immediately before the procedure begins is mandatory.
After the waiting time, you need to turn off your smartphone and enter Fastboot mode, holding the power and volume buttons at the same time. Connecting the device to the PC, you should press the unlock button in the Mi Unlock utility. If everything goes well, you will see a message about successful unlock, and an open lock icon will appear on the phone screen.
What to do if the timer is reset?
Recovery Update Method (without PC)
The easiest way to upgrade or restore a system is to use the built-in recovery mode, which is suitable if the phone is switched on but is unstable, or if you want to upgrade to a newer version within a single region (for example, from China Stable to China Stable).
The firmware file must have a.zip extension and be placed in the root of internal memory or on a microSD memory card. It is important that the file name does not contain Cyrillic or special characters. Run the file through a standard Explorer and the system will suggest rebooting to update mode.
If you don't automatically start, go to Settings → About Phone → System Update. Click on the three dots in the top right corner and select "Select firmware file." Specify the path to the downloaded archive, and the verification and installation process will begin.
- 📱 Make sure the new firmware version is newer or fits the current one, as rollback to an older version via Recovery is often blocked.
- 🔋 Do not interrupt the installation process even if the screen goes out or a logo appears. MI.
- 📂 The firmware file must be fully loaded and verified for integrity, otherwise the installation will be interrupted at step 99%.
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Before installing via Recovery, rename the firmware file to “update.zip” – this is the standard name the system looks for first, which can solve file recognition problems.
Firmware via Fastboot and MiFlash
Fastboot is the most powerful tool for Xiaomi device recovery and allows you to install firmware of any type, including cross-regional.To work, you will need the MiFlash Tool utility and firmware in.tgz format, which must be pre-unpacked into a separate folder on your computer.
After switching the smartphone to Fastboot mode (pressing the power and volume buttons down) and connecting to a PC, the Android Bootloader Interface device should be displayed in Windows Device Manager. If you see “Unknown Device” instead, you need to manually update the drivers through the Device Manager, indicating the path to the Xiaomi driver folder.
In MiFlash, click the Refresh button to find the connected device. En route to the files, specify the unpacked firmware folder. At the bottom of the window, it is important to select the correct firmware mode: clean all will clean the data completely, save user data will try to save it, and clean all and lock will lock the bootloader back, which can lead to an error if the regions of the firmware do not match.
| Firmware mode | Data retention | Locking the loader | Risk of error |
|---|---|---|---|
| clean all | No (full reset) | No (remains open) | Low. |
| save user data | Yes. | No. | Medium. |
| clean all and lock | No. | Yes (blocked) | High (when changing region) |
Press the Flash button and wait for the process to complete, which can take 100 to 300 seconds. The success status in the Result column means successful completion. After that, the phone will automatically restart, and the first download can take up to 10 minutes.
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The use of the “clean all and lock” mode is possible only when the device is firmware in the same region from which it came, or if there is an official global firmware with a closed bootloader.
Solving Typical Errors and Problems
During the flashing process, users often encounter error codes that can scare the inexperienced person. One of the most common is the “Miss matching image and device” error, which occurs when trying to flash firmware that is not intended for a specific device code name (for example, firmware for sakura in sakura, but different regions without unlocking).
Another common problem is hanging on the MI logo or endless restart (bootloop), in which case you need to perform a forced reboot, holding the power button for 10-15 seconds, and try to enter Recovery mode to perform a reset (Wipe Data). If this does not help, you will need to re-rout through the Fastboot with a full clean mode.
⚠️ Note: If your computer stops seeing your device in Fastboot mode after a failed firmware, try using another one. USB-port (preferably) USB 2.0) or other cable, as the problem may be a shortage of power.
It is also possible that MiFlash will give you a Flash All Failure error, which often indicates a driver problem or a corrupt firmware file. Check the integrity of the archive and make sure that the path to the folder does not contain Cyrillic characters.