I'm having issues with my bluetooth on my iPhone connecting to my car stereo. It connects fine and I can happily play music etc without issues, but when I receive or go to make a call the connection disconnects and reconnects 30seconds after. If I don't play any music and make and receive calls then it works fine and stays connected. So there seems to be an issue of switching from music, other apps to have a connected phone call. I've tried several other phones (Samsung and iPhone 6) and they work fine. Which narrows it down to my phone? Anyone have any such issues? Cheers.