Many are asking about to update/upgrade to MIUI 12 ROM from MIUI 11 or want to downgrade ROM from MIUI 12 to MIUI 11, but will have issue with unlocking the bootloader.
Visitย http://en.miui.com/unlockย and apply for unlocking your device.ย ย
Downloadย Mi Unlock toolย to your PC & Extract it.
mi unlock tool โ direct download link
Go to Setting > About Phoneย >ย All Specs and tap on MIUI Versionย 7 times
ย Enable Enable USB Debugging and Enable OEM Unlocking. Go to Setting > Additional Setting > Developer Options > Enable USB Debugging and Enable OEM Unlocking.
Now from Developer Optionย ย add your account to โMi Unlock statusโ. Disable Wi-Fi connection and bind your account.
After, reboot your device into fastboot , for this just restart your device and keep push volume down ( โ ) button.ย Then connect the device to the Windows PC/laptop via a micro USB cable.
Launch Mi Unlock Tool viaย run as administrator.
Follow the steps from the app and unlock your bootloader.
