I have the x930bt model. When I first bought it, when I connected my Samsung phone via Bluetooth, the song information showed on the screen and I was able to use the head unit to change tracks and pause music. Now, the sound still works, but there no song information showing and I cannot change tracks or pause music with the head unit. This occurs both with Google play music and Pandora. I tried unpairing and unregistering my phone. When I do that, everything works until I switch the head unit away from bluetooth (e.g. To AM/FM) and then back again, then the song information disappears and the controls no longer work. I've been attempting to fix this for close to a year now, so any help would be appreciated! My phone is a Samsung Galaxy S6.