root

boot unlock

developer mode

tap 8 times on "Build Number" in "about" settings
in "additional settings", select "developer options" & enable: "OEM unlocking" & "USB debugging"

MI account

create MI account & add device to account

install Drivers

install ADB & Fastboot Drivers on PC with file : "adb-setup-1.4.3.exe" & "Windows6.1-KB2999226-x64.msu"

Add driver manually with:

• Select device in "device manager"
• Select "update driver"
• Select "Install the hardware that I manually select from a list (Advanced)"
• Select "android device"
• Click on "Have Disk..."
• Locate the extracted driver manually on your computer (file "adb-setup-1.4.3.exe" extracted manualy)

Download & unzip software "mi unlock tools" from https://en.miui.com/unlock/

Unlock xiaomi device with launching "mi unlock tools" with administrator rights

connect xiaomi device in fastboot mode with USB cable (fastboot mode: turn off & pull on "touch down" & "power" buttons)

Unlock device & wait 7 days to do it definitively

After 7 days unlock device

Launch "mi unlock tools" with administrator rights

loggin "mi unlock tools" & unlock device with confirmations...

install TWRP

adb devices -l # Get list of connected devices

adb reboot bootloader # reboot in fastboot

fastboot devices -l # Get list of connected devices

fastboot flash recovery /pathto/recovery.img # flash boot with TWRP

fastboot reboot
pull volume- during reboot until TWRP are displayed

TWRP/advanced/Disable replace TWRP

Fews commands with fastboot

fastboot reboot-bootloader # reboot in bootloader mode
fastboot erase cache # erase data cache in device
fastboot boot /pathto/recovery.img # ?

fastboot flash recovery recovery.img
fastboot flash vbmeta vbmeta.img
fastboot boot recovery.img