UPDATE: I found a solution for GSM/CDMA iPhone 4S on 6.0/6.0.1. Watch: http://www.youtube.com/watch?v=ToihAP0o46I
$4.99 AT&T Factory Unlocks at http://www.iPhoneTy.com
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I spent some time with the r-sim 7 to find out of it really will unlock GSM and CDMA iPhone 5/ 4S on iOS 6.