So I have a 2013 Elantra Limited with the Nav system installed. I am running to an issue that I can't seem to figure out how to fix. I have tried with my iPhone and as well as other Android phones, when someone calls me, the name does not appear on my screen. For some reason it adds a +1 in front of the number so if the number calling is 732-555-555 and it's listed under John, it'll come up +17325555555 and not the name. I even tried putting the +1 in the contact in my phone. I have called tech support and it says it's a compatibility issue with the iPhone with iOS 7, but it was happening with iOS 6 and as well as Android Phones. I have AT&T if that helps the situation