My Samsung Galaxy Stellar is only a few months old. Every since I bought it, it will reset itself randomly. Sometimes in the middle of a phone conversation, and sometimes in the middle of the night when I'm not using it at all. It will freeze, vibrate once, then reset itself. Many times it will say a completely different date and time also, and then it will reset. The other day it turned off and I couldn't get it to come back on for 4 hours. I've tried taking the battery out (multiple times) and the SD card. HELP! This is very frustrating.