Several problems since factory reset.

view story

http://forums.androidcentral.com – Hello! A few days ago I was playing with the pattern lock, and I locked the phone so it had to be unlocked with a google account. Then I found out that this ain't possible due to some bug, which doesn't accept the password even though it's correct. Then I was somehow forced to do a factory reset (Volume up + On/Off button). At first the phone seemed the same as when I bought it, it was only much laggier and prone to freezing. Then I noticed that the phone can no longer be normaly shutdown or rebooted. If I press shutdown, the phone freezes on the shutdown animation, always at the same situ (HowTos)