Originally Posted by netlogger
Fixed the situation today and get unlocked.
I figured it out that it is because of enabling "OEM unlocking" in developer options wasn't working.
I noticed that, I enabe this option but when I return to developer options after a while, it was disabled again. On last time I triedto enable it 2-3 times again and again. And waited for 1-2 minutes, then a warning message appeared at the bottom. After I accept that warning, this option stayed enabled whenever I entered to developer optons again.
After this change, Device unlocked without any error...
Hi, first of all i had to wait 360 hours before unlocking my Mi9. Then i got this message "couldn't unlock device" too. Very annoying. After that i tried again, but now i have to wait another 360 hours before unlocking. So i will remember your solution and wait for this warning to accept. Thank you.
Note: downgrading Mi Unlock Tool is not the solution.
---------- Post added at 09:16 AM ---------- Previous post was at 09:16 AM ----------
Originally Posted by FantasiaGame1
downgrade your miflash to version 2.3.803 lhttps://drive.google.com/file/d/0B-F6_jbKa-OsbUFCZm1TUk9lMEE/view
downgrading is not the solution