Started to work with the phone and it started to freeze in the mail app, but would unfreeze if I hit the power button once to basically lock it and then would be fine unlock. The freeze consists of not being able to do anything with the touch screen but the track ball works. Also, without touching the screen, the phone inputs its own text characters in text, or searching, online, etc. I was using a screeen protector and after removing all of of the issues went away but then it needed charge and I used my car charger and they came back. Took it off the charger, they went away, and as the battery has drained very low, the problems are back. Could it just be the battery?