I was able to get FaceTime to activate by modifying carrier.plist to look like this.

key>PhoneNumberRegistrationGatewayAddress</key> <string>+011447537410207</string>

Of course, commenter must be patched first. If FaceTime activates correctly, you will receive a text back from that number above that will look something like this


REG-RESP?v=3;r=223c990a;n=+1XXXXXXX;s=024F727328FFFFFF FFAD1F6C1DD2552BFADA083E5D2AAADDD9A902E805

I can confirm 3G, MMS, FaceTime on nTelos wireless