I have the iphone 4 and all of a sudden when I try to listen to music or podcasts, the sound cuts off after 1 or 2 seconds. I can still see the song or podcast is playing because of the song time still going, but no sound. Also when I have a call coming in, I can hear my ringer for the same 1 or 2 seconds, then silence. Also no sound when I tried with headphones either. Any ideas?