I have an iPhone 3G, 3.0 beta 5. The phone is stuck permanently on headphones. Tried the plug/unplug step, did not work. Restored 3.0 beta 5 three separate times, nothing works. Phone calls come through and the phone rings, but I cannot hear anything. Playing voicemails does not work unless played with speaker. I was told by the Apple 1800 # that they would not fix it because it is running beta software. If I bring it into an Apple store will they do something? iPod plays but no sound comes out unless headphones are plugged in. Any recommendations?