I could not go back to android p, when I did the procedure it is on the screen fastboot
and does not go out, I could only go back to oreo and now my 5z does not update manually to 9
what can I try?
my 5z does not update neither by adb he gives the error in 46%
nor putting the file in the root that he gives (system update failed)
I downloaded it I downloaded it and installed it just gets stuck in fastboot mode just got it resolving going back to android 8 now my z5z no longer wants to upgrade to other versions of android nor can anyone manually help me?