Iphone 5. I cannot end a call sometimes?

I did a master reset and im still having this problem? Basically when im in a call and I try to end it its just frozen its like it doesn't detect my finger hitting end. Should I bring it into AT&T? Thanks for your help!

ATT wont do anything… Crapple does NOT allow ATT/Verizon/Sprint/Tmboile/etc to repair or troubleshoot hardware issues. In their eyes, Carriers only exist to give it signal… Nothing more… Nothing less… This is THEIR phone… Not yours…

go to Apple… Or call Apple… 1800myiphone

You can call your carrier… But you will transfered to Apple immedately. Just an FYI