iPad 4, iOS 6.1. When I try to connect to my router on wireless N ONLY, it fails. If I change it to mixed it connects. I thought iPad supports wireless N? Why wont it connect to an N only network? I tried 5.0 and 2.4 Ghz bands, same result... I did a complete DFU mode restore and set up as new, did not install anything or restore from back up and immediately tried N only and it did not work...