I have an AT&T iPhone 3GS that I upgraded to ios 5 immediately upon release (because I'm the impatient sort). Now I have my 4S and don't need the 3GS anymore, and a friend wants to take it to use permanently in Peru with her SIM card from down there, is this possible at this point? She's even less technologically inclined than I am, so the other part of the question would have to be how difficult it would be to keep it working once there?
Thanks
Thanks





