I made the mistake of buying the S9 thinking I could use it for stereo and phone duties. Besides the A2DP issues the headphone even in basic phone mode is less than ideal, almost useless in fact. The volume buttons work but not the answer button or any multimedia buttons. The sound quality sucks considering what it should be capable of. Before giving up completely on bluetooth I tried a basic BT earpiece and it works fine. answer button and vol controls work and the sound is decent. Just no good for music but as a phone device it works fine. I hope that the BT functions get ironed out but as a technology I'm less than impressed with BT overall. Make sure the device does what it should before committing the bucks. Once again, standards seem to have no place in the minds of corporate.