I've had numerous problems with Sync connecting to my iphone 4 (version 6.1.3). Sync locks up (but works with other features) and won't connect to the phone one time and then the next time it will recognize the phone. Had the computer rebooted and updated software several times at the dealership. Recent problem is playing music from the iphone via bluetooth. It starts out fine, then "pauses" on the MFT screen, but continues to play on the iphone. I hit "play" on the MFT screen and it picks up the song where it is on the iphone, but constantly drops the bluetooth signal. The dealership wanted me to update to version 7 claiming to be a phone software issue, but I only have a 8gb on the phone and Verizon does not recommend updating to v7 for my phone. The iphone plays music great, so I honestly doubt that it is the problem. Haven't tried connecting via the USB, but several in this forum are recommending against that. I think the problem is with the MFT's bluetooth software. Any suggestions? I have about 2gb of music on my phone.