I received a text message (I felt the vibration), and when I pulled it out to take a look - it was completely non-responsive. Home button, sleep wake button. Nothing. SO I plugged it into iTunes, and nothing....for a few seconds then it jumped to life, making a buzz, a beep, and some other weird sounds. Then synced up. Odd. Then it died a few moments later - completely unresponsive again. I plugged it into iTunes again, and it had an error 'reading the device'. Un plugged and replugged, and it synced, but nothing was showing on the display. I held both buttons down to hard reset, and then it booted up. It seems ok. What could be wrong?