Since upgrading to iOS 6.0 (and 6.0.1) both my iPhone 4S and my fiances iPhone 4 have had sound issues. Randomly sound will stop working.. it still rings and you can speak to a person both on and off loudspeaker, but all other sounds stop working. Clicking the volume up/down buttons does nothing either (no volume bar). I've tried restoring to factory defaults but it makes no difference.
I went to a local certified Apple repair store (not an official Apple store because there aren't any near here), they tried to tell me it was a hardware issue and the phone and/or dock needs replacing, but for it to happen on two different phones after iOS 5.1 worked fine for over a year makes be believe it's a iOS 6 software issue.
There's a thread about it on the Apple forum: https://discussions....tart=0&tstart=0
but no working fixes. Is anyone else experiencing this, is so have you found any workarounds?