Once you’ve got your iPhone 3G home from the store, the first thing to do is set it up. If you’re upgrading from the first-generation iPhone, the process is almost exactly the same. If you’re new to the iPhone, though, you’ll find the process pretty easy, too.
NOTE: This guide is geared towards the upgrader, rather than the new iPhone 3G owner, but the process is very similar for a new set up. To get a sense of what the set up process for a new owner is, check out the original iPhone set-up guide.