Ever since upgrading to iOS6B4 everyone has been complaining about the low quality audio playback on their devices. But I'm having a totally different issue. When I plug in my iPhone 4S into my BMW to play music it plugs in like normal & charges my phone. But when I go to select a song to play (Using the car to select the song since on the iPhone when it's plugged into the car the music app says "Accessory Connected" obv...) it only plays out of the iPhone itself not even my car. Like my phone doesn't understand how to output audio ever since Beta 4 was released. Has anyone found a way around this or a fix? (Oh and this all started on Beta 4, none of the other betas.) I have a feeling we're just gonna be stuck with these stupid issues for a while now. Oh well just thought I would share my issue and see if anyone else has had the same issues as me. Thank you.