I'm eligible for an iPhone 3GS upgrade but my brother is not. (we are on separate plans). What I'd like to do is upgrade my phone and then give it to him for his birthday and just keep my current 3G as is. My question is: Do i need to activate the phone under my account first (via iTunes) after I get it in the mail? (The AT&T rep who was handling the upgrade said something about the phone coming activated on my account.) Ideally, I'd like to just give it to him unopened but I need to make sure that my service on the current 3G will not be interrupted. And will he be able to activate it on his account even though it was an upgrade on my account? Thanks!