My wife and I are using the Blackberry 9700. Pairing was a cinch for both phones. However, when we return to the vehicle (phone BT on) and start the car, all of a sudden we hear " pairing failed, pairing failed". This continues until either the car is turned off, or fighting the phone constantly displaying " waiting for Sonata", and turning off the BT on the phone. I did check the list of compatible phones on the Hyundai website, and the 9700 os not listed. A matter of fact, no phones in or after late 2009 are listed. I find this a little bothersome. Most folks get to upgrade a phone every two years. It's sad to think that one would have to keep an obsolete phone just so it works well the 2011 Sonata. I wonder if there's an OS upgrade avail for the Sonata's bluetooth system?