I charged my phone yesterday morning at home in an area where I supposedly have 5 bars of service. Then I took a train down to Baltimore, and the battery and phone seemed to be working fine. When I got to my apartment, the phone started draining very rapidly, and all I had done was send a few text messages. I plugged it in to charge again, and at some point in the night I received 4 text messages at once, then no further activity. When the phone was charged, I unplugged it and went to sleep. This morning I was woken up by it dying again, and I obviously didn't use it while I was sleeping (received an onslaught of e-mails and Facebook messages on it as well, all at once again). Does anyone know what's wrong with this phone and how I can fix it? I'm in yet another great service area, smack dab in the middle of a city, so that can't be it.

Thanks!