ENTER TWRP WIPE DATA/FACTORY RESET
INSTALL ROM AND GAPPS
IF YOU HAVE PASSWORD IN BOOT,TURN OFF THE PHONE
PRESS VOL+ AND POWER TO ENTER TWRP
FORMAT DATA
REBOOT
How to Upgrade to MIUI 9 METHOD 1 1. Please don’t forget to back up your data before upgrading to MIUI 9. 2. If you are using MIUI V5 / MIUI 6 / MIUI 7 / MIUI 8 stable ROM, please upgrade to MIUI 9 via fastboot method. 3. If you’re using MIUI 8 Global Beta ROM, please go to ‘Updater’ and check for updates. 4. If your device is locked, please unlock it before fastboot flashing. How to unlock your phone bootloader? 2-fastboot tutorial:https://www.youtube.com/watch?v=FBQ4iH_rsgY 4-unlock bootloader:https://www.youtube.com/watch?v=55_gqR4ZjCE