I just Jumped on T-Mobile from my LG G2 (Android 5.01) to the LG G4 (Android 5.1). My car is a 2013 VW Jetta Hybrid with I believe the RNS-315 Stereo Head Unit. The G2 when on Anroid 4.4 synced fine for phone, and always displayed the incorrect song titles on the head unit for music. When I upgraded the G2 to Android 5.01, all Bluetooth features and syncing was perfect. Now on the LG G4, my phone pairs with the Bluetooth. I can accept phone calls, and I can play music. However, it does not import my contacts, and I can't voice-dial. Also, the music plays, but the song/artist/album titles do not display. The HU just displays "Bluetooth Audi". I have both Phone and Audio profiles enabled. I have tried the PlayerPro app, the Google Play app, and native music app. All same behavior. Any suggestions?