My email was working fine for a couple of weeks and then suddenly I could not access my account. It would not come up with an error message or anything, the whole screen would just be blank. Then suddenly today, it went to a dark screen and has a circle going round and round and nothing else. I tried using the sleep/wake button to turn it off and nothing happened. I tried plugging it in to my mac and itunes said it could not sync because of an error. The battery was low when this happened but its been plugged in for over an hour and still nothing. Help!