Should be automatic. I don't have to do anything special to return to music after a call, whether it be with my Moto Hint, motorcycle helmet Bluetooth headset or car (all use the A2DP profile). What is exactly happening? Is the music remaining paused or did you check to see that the music volume is up? Is the phone call being hung up? I believe there are separate music volume settings for phone and media. For what its worth, I use the Persist + app to control volume.