Strange. I used Spotify on my iPhone 4 AT&T in my car and it was great quality sound and I could control it from my steering wheel and the display showed the song name. Switched to iPhone 4s with Verizon. The sound still comes out but the sound quality is lower I cant control anything from my steering wheel. I have to use actual iPhone. Nothing shows up on my car display either. Is it iPhone 4s issue or Verizon issue? I dont understand but it is strange