There’s a tutorial about tethering the iPhone 3G to a laptop. Before you start to implement it, remember that this might be against your use license agreement with AT&T, which could add charges, cancel your account and potentially do many more painful things in retaliation – or they may do nothing at all, we just don’t know. Here’s the overview on how to proceed:
Visit cre.ations.net to get the full step-by-step instructions. and of course, test the speeds on DSLreport for mobiles and let us know how fast it is!