So I was listening to music on the iPod, and went to call my friend to see what he was doing. But when I started to make the call, the music stopped coming from the external speaker, and started playing out of the headset part, and I could not hear my friend talking but barely. Is this a software glitch? I have never had this happen to me on my 3Gs or anything. (This was on an iphone 4 btw).