I had the best connection (perfect audio even rooms away) when the headset connected while I was playing music (or sometimes if music was the first activity I attempted). Trying to answer a phone call, making a phone call, or non-music activity would destroy the A2DP connection. Trying to play music again would be impossible, it would even break up just if I let the screen go to sleep, unless I disconnected, pstaryed music, then reconnected again. Repairing might have helped, I can't remember now.
Point is, the A2DP connection stops working if you use the headset for something other than music. At least, that's my experience. Which… is why I'm returning them to Amazon. If I'm just going to use them as wireless headphones, I want to get wireless headphones that doesn't pretend to be a good headset too.