This happened to me tomight. Really kind of hacked off. Listening to Pandora and using Sprint nav to get me and my son to the monster truck rally. All of a sudden boom, Pandora quits and gps stops. It was really bad timing, total ghetto part of town.
What sucks is the phone said it was in airplane mode, but yhe settings said it was not. Had to reboot to get it working. On the way home everything worked great.