I personally like Synergy... I have no issues with the bluetooth connection to my new Sony XAV-62BT since flashing (did before). Connects perfectly every time! I had to do a lot of research to find some of this, so I'm going to post here in case someone needs the same help...but the trick is to let the phone find the stereo first and then enter the pin on the phone when prompted (0000). Next, the stereo will ask you for a passcode. Despite the common sense, passcode=pin. I made the mistake of trying to enter 1234567890, like a moron. So entering 0000 for the passcode did the trick. I am able to stream Amazon Cloud, Pandora and take phone calls. Love this ROM!