Requirements: Your MI Devices, USB Cable, Recovery firmware, Proper USB Drivers, a windows PC.
Step 1: Download the latest MIUI ROM file from here
If you have already download the required files please skip this step.
Step 2: Connect your MI device to the Windows PC/laptop via a micro USB cable, and copy the file downloaded in Step 1 into the folder ‘downloaded_rom’ on the internal storage of your device.
Step 3: Now, Launch ‘Settings’ app on your device, select ‘About phone’, click ‘System update’, then press ‘three dots’ icon at the top-right corner of the screen, and select ‘choose update package’ to enter. Choose the ROM file you’ve put in ‘downloaded_rom’ in the Step 2.
Step 4:After choosing the right ROM file, your device will begin updating our Android. Your device will automatically boot to the new version when the update is completed.
Congratulations! you have successfully flashed the latest version firmware on your MI devices.