[BigBird65]

I have an iPhone 4 on IOS7 and AT&T service. All works fine with my 2013 Elantra. IOS 6 worked fine also. My wife has the same setup and it also works fine. No +1. Tell tech support that they are wrong about the compatibility issue.

 

[BigBird65]

A little more information. I just went out to the car and downloaded the recent history of my bluetooth calls. All calls showed the name associated with them in my iPhone with the exception of a few calls answered where the number was not in my phone. These were regular 10 digit numbers.

Have you downloaded your iPhone to the address book in your Elantra?

 

[BigBird65]

Congratulations, you may find someone interested in your problem. That is half the battle. It is far easier for them to say "That is a known issue" and just leave you hanging. Don't give up.