I have now an iPhone 4S. The first time I connect it to my Rio (Navigation) it was working fine. I upgrade to iOS 6 and the phone is connect but the calls are not "transfer" to the car. I found this:
https://discussions.apple.com/thread/4318307?tstart=0
It not Kia hardware it's iOS 6 !!!
https://discussions.apple.com/thread/4318307?tstart=0
It not Kia hardware it's iOS 6 !!!