Hi again. Recently sounds in my Pre go crazy. Speaker on back didn't work but music (by music app) played via speaker on front! When I called someone I didn't hear him. Then I pushed the button "speaker" and then I could hear him via front speaker. And some day it fix by itself. Then App Catalog stop working and I did Full Erase. And everything was ok. AND NOW the sounds go crazy again. I think it's because of some patch but I don't know which one. All patches are still installed but Preware can't see them. How to do true Full Erase? Or maybe is there other solution?