Hi guys,
I have a question for you.
I have wait till now to update from MIUI 8 to MIUI 9,
well, now I have Android 7 and Miui 8.6 ROM 7.7.20 weekly and TWRP 7.3.0.3
What should I do to go to MIUI 9? Is it sufficient install the last one ROM 7.10.19?
Just install newest weekly ROM through updater app. All neccessary wipes will be done.
If your bootloader accidently will be locked again because of the new BL-file, just unlock it by official MIUI unlock tool.