Thx ! Is it complicated to install it ? I will check ! Need full wipe ?
It does, here is the tutorial copied from miui forums:
1. Navigate to Wipe menu
2. Select Format Data and type "yes"
3. Back out of that menu to "Wipe" menu again
You shouldn't, but when I had greyed out that option, flashing key swap zip repaired it for me (or maybe it was something else I didn't notice), I don't advice it for you, but you can make backup and try.
Interesting, flashing the zip fixed tha...