Okay, I need some advice here on the easiest way to do this: I currently have an iphone line with AT&T with just an individual plan (grandfathered unlimited data). I want to: Upgrade my current line from 3GS to 4S (I already purchased from Apple.com), add another iPhone line (4S also purchased from Apple.com), and then start a Family Plan with AT&T while keeping my unlimited data and $5 text plan. So...I'm thinking that once I get the phones, I can just open them and activate both within iTunes and have two individuals lines. And then I'll just call AT&T to merge them into a single Family Plan. Am I missing anything? Would it be easier to go into an AT&T retail store to take care of the Family Plan part? Obviously I would like to just be able to do everything from home and not leave the house...however, it's more important that everything goes smooth and I don't end up losing my unlimited or $5 texting. Any advice?