ok very very strange issue that has survived two restores and i cant seem to fix. ALL of my sound works correctly except during phone calls. Sound works fine during skype, voice mail, games, music, video. but the speaker, headset (wired) and receiver do not work doing calls. I have restored twice, without restoring the backup. once from regular mode once from DFU. no dice. I've tried the whole headphones in and out trick but that is defiantly not the issue as skype and games are still going though the correct speakers. Any suggestions? if not i have an appointment with apple on Monday morning.