Xiaomi Mi Flash Tool is the official Xiaomi tool for flashing and installing ROMs on Mi, POCO, and Redmi devices. With it, you can install an official ROM on your devices to update them or fix any problems you've encountered.

To flash custom ROMs, it's best to use a modified recovery and do it from the smartphone or tablet itself. However, if you want to install a stock ROM to update your device or do an installation from scratch, and your device isn't rooted, doing so through Xiaomi Mi Flash Tool is the most convenient.

Xiaomi Mi Flash Tool is pretty easy to use. First, you have to reboot the device in Fastboot mode. To do this on a Xiaomi device, press the power button and the volume down button at the same time. Once you have it in this mode, you can control it via ADB or with programs such as Xiaomi Mi Flash Tool.

After that, open the program and make sure that your device is detected. If not, you'll have to install the drivers so there are no compatibility problems. Then, find the ROM file that you want to install on your device. Click on Flash, and it will be installed automatically. After finishing this process, you'll be able to use the new ROM on your device.