I had major problems with A2DP on my Mogul when using them with a pair of Motorola S9's. The music would always be choppy with regular skipping when I was out and about. I discovered two problems. First there is no need to change the registry for jointstereo on a WM6 phone since stereo is already supported all it does is make the sound quality worse in my opinion. The big thing I discovered and what I think ultimately fixed my problem was changing the way I placed my phone in my pocket. I always used to put my Mogul in my pocket face side out but since I started putting it face side in the music skipping has stopped. Maybe the bluetooth receiver is on the back and is extra sensitive I don't know but whether or not this is really what fixed my problem I am very happy again with my Mogul and my S9's.