Hello, today I was leaving church and my phone had no signal for about 30 minutes in an area I knew had Sprint service. So I restarted the phone having 80% battery and when the phone turned back on it was on 1%. It won't go back to reading the actual battery percentage, and the phone has been on for 2 hours since this happened so the phone really isn't on 1% battery. Any suggestions on what happened or what I should do?