Although the voiceover on this YouTube video was almost too soothing to listen to, the demo being explained definitely got our excitable attention. We're not sure about this hack's details, but the user demonstrating his iPhone's non-AT&T outgoing call usage here gets two thumbs up from us. Apparently, his iPhone was modified to allow non-AT&T SIMs to make outgoing calls on the Telstra network, although no incoming calls were demo'ed in the video. From watching it, wethinks registration on any GSM network would probably be possible. And catch that authentic GSM radio noise interference that's clearly audible.