I have a current 3GS. For some reason, somebody at AT&T screwed me over and activated me on a 24-month contract instead of the 18-month contract I should've been on, so it made me ineligible for an upgrade. HOWEVER, we have one line on our plan that is currently eligible for an upgrade. My plan is this: 1) Buy the iPhone online (as in-store requires activation, yes?), and use eligibility for the eligible line. 2) When I get it, go into iTunes and activate on MY line. Is this possible - has anyone else had experience doing this?