I am considering buying an iPhone 3G and I was just wondering will this chip work? http://cgi.ebay.co.uk/SIM-Unlock-Unlocked-3G-iPhone-3G-TurboSIM-SIM-unlocking_W0QQitemZ330279968338QQcmdZViewItem?hash=item330279968338&_trkparms=72%3A1300|39%3A1|66%3A2|65%3A12|240%3A1309&_trksid=p3286.c0.m14 All I need to know is: 1. Will it work? 2. How reliable is it? 3. And how does it work exactly? Thanks, any help is appreciated.