How to reflash the Xiaomi Redmi 6A phone: the full guide

Redmi 6A has been out of the active phase of support from the manufacturer for several years, which often leads to thinking about changing software. Many users are faced with a situation where the standard version of MIUI stops receiving security updates or starts to work unstable due to accumulated software debris.

The process of flashing may seem complicated only at first glance, but with strict adherence to the algorithm of actions it is available even to beginners. It is important to understand that you will work with system files, so any error can lead to data loss or, in the worst case, to turn the phone into a brick.

Before you start active actions, you need to realize that the firmware Xiaomi Redmi 6A — It's not just copying files, it's a complicated process of interacting with the bootloader. 90% of the success of the operation depends on the quality of the preparation and the availability of the original. USB-We should not ignore the preparatory stage, because it determines whether the process will go smoothly or end in unpredictable errors.

Preparation for flashing and choice of method

The first step towards the new system is to choose the right installation method. Three main ways are relevant for Redmi 6A: update via the Recovery menu, use the official MIUI bootloader tool or advanced firmware through Fastboot using the Mi Flash Tool utility. The first option is suitable for updating within one region, the second is for changing the language and region without losing data, and the third is for completely cleaning and installing any version of the software.

The critical thing is to back up all your important data. Even if you plan to just upgrade, there's always a risk of losing contacts, photos and messages. Use the built-in sync function with your Mi Account or Google account, and copy media files to your computer or cloud storage. Remember, once you've run your Fastboot, your internal memory will be completely cleared.

It is also necessary to charge the device at least to 60-70%. The re-flashing process may take 5 before 15 If the battery dies when the system partitions are written, it's very difficult to restore the device. USB-The computer port is good and the drivers are good. ADB Fastboot is installed correctly.

⚠️ Note: Bootloader unlock is required to install custom recoveries and global firmware on Chinese versions of devices. Official unlocking via Mi Unlock Tool takes between 7 and 168 hours of waiting.

Required tools and drivers

To succeed, you’ll need not only the smartphone itself, but also specialized software on your computer, the basic set of Qualcomm or MediaTek drivers (depending on the modification of the processor in your instance of 6A), as well as ADB and Fastboot binaries. Without these components, the computer simply will not see the phone in the desired mode.

Special attention should be paid to the connection cable. Cheap "charging only" cables are not suitable for data transmission and can cause a communication interruption at a critical moment. Use the original cable or high-quality analogue with thick wires. USB-port soldered directly on the PC motherboard, avoiding front panels of the case or USB-hub.

Below is a table of compatibility of tools for different tasks:

Unlocking the Bootloader bootloader

If you own a Chinese version of your smartphone or plan to install a customized recavator, you can't avoid unlocking the bootloader, which is a security mechanism that prevents you from tampering with the system partition without the permission of the account owner. For Redmi 6A, this procedure is standard and is done through the official Mi Unlock Tool utility on the PC.

The process starts by linking your Mi Account to your phone settings. You need to go to Settings → About Phone → MIUI version and click on the build number several times to activate the developer mode. Then in the advanced settings (Additional → For developers), you need to turn on the "Factory Unlock" item and tie the device to the acca.

After that, you have to wait for the company's time, which can be up to 7 days.

It is important to understand that once the bootloader is unlocked, Android security will alert you every time you turn on that the device is unlocked, which is normal and not a sign of a breakdown, and some banking applications may refuse to work on such devices, requiring additional manipulation of access rights or concealment of root rights.

Firmware via Recovery Mode (No PC)

The easiest and safest way to upgrade or reinstall your system on Xiaomi Redmi 6A is to use the built-in Recovery mode. This method does not require a connection to your computer or complex drivers. You only need a downloaded firmware file in.zip (Recovery ROM) format, which should exactly match the model of your device.

To start, put the firmware file in the root of the smartphone's internal memory. Then go to the update menu and select three dots in the corner of the screen to select the file manually. Once the selection is confirmed, the phone will suggest rebooting. If the automatic selection did not work, you can enter Recovery mode manually by holding the Volume Up + Power key combination on the device turned off.

In the Recovery menu, you can navigate with volume buttons and you can choose with a power button. You can select Wipe Data (if you want a full cleanup) or go straight to installation. Choose Install or Apply Update, find your zip file and confirm the action. The process will take a few minutes, after which the device will reboot to the new system.

⚠️ Note: When you switch from one version of Android to another (for example, from Android 8 to Android 9) or when changing the region, be sure to do a full data reset (Wipe Data), otherwise cyclic reboots are possible.

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If the phone hangs on the Mi logo for longer than 10 minutes after firmware, try logging in to Recovery and doing Wipe All Data. This often solves the compatibility issues of the old file system with the new firmware.

Install firmware via Fastboot and Mi Flash

The Fastboot method is the most powerful tool in Xiaomi repair specialist’s arsenal, allowing you to flash the device even if it is not turned on or in bootloop state. The Redmi 6A will require firmware in.tgz (Fastboot ROM) format, which you must pre-unpack on your computer.

Launch the Mi Flash Tool on behalf of the administrator. Put your phone in Fastboot mode, holding down the Volume Down + Power buttons at the same time. Connect the cable to your PC. In the program, press the Refresh button to determine the device. On the way to the files, specify the folder with the unpacked firmware. It is important to choose the firmware mode at the bottom of the window: Clean All (full cleaning) or Clean All and Lock (clean and lock the bootloader).

When you press Flash, you start writing partitions, and you're not allowed to turn off the cable or interrupt the power at that point, and the code will change on the phone screen, and the program will fill in the progress bar, and when you finish, you'll see the green "Success" sign, which means successful installation.

fastboot devices


fastboot flash boot boot.img




fastboot flash system system.img




fastboot reboot

The above code shows what the command line firmware process looks like, although the Mi Flash Tool does all of these things automatically. The GUI is preferred for beginners because it reduces the risk of human error when typing commands. However, knowing the basic commands of Fastboot can save the situation if the Mi Flash utility gives an error.

Possible errors and their solution

When you flash Redmi 6A, users often encounter a variety of bugs, and one of the most common is Error: Missmatching image and device, which occurs when you try to flash a firmware designed for another model or region, or when the bootloader version does not match the firmware version, the solution is to download the correct file that strictly matches the device's code name (for example, platina for Redmi 6A).

Another common problem is driver error or the device's absence from Device Manager. If your computer can't see your phone in Fastboot mode, try replacing it. USB-Connect it to another port or reinstall the drivers ADB/Fastboot. Sometimes it helps to simply reconnect the cable after entering Fastboot mode.

There may also be a memory loss error on the device itself when installed via Recovery. Make sure the firmware file is in the root directory of the internal memory, not in the folder, and that there is enough free space on the disk. If the internal memory is damaged, the installation can be interrupted in the middle.

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90% of Xiaomi firmware errors are due to a bad version or a bad version USB-Always double-check the device code name and file integrity before starting the procedure.

Frequently Asked Questions (FAQ)