Looking at a used iphone 2g Monday and I'd like to know if I can swap in my brother's AT&T non-iphone sim card to see if i can make calls or if other features are working. the P.O. says he has wiped it but I'd like a way to know if said iphone works before getting home to plug into itunes. Are these phones generally ok? Even the ones that brick from uneducated hacking seem to have a fix. Appreciate any suggestions. Thanks.