1. I just went to my local AT&T store and they told me that I would have to get the $25 2GB data plan because, even though I have been an AT&T customer for numerous years now, since I have a BlackBerry, my current $30 unlimited plan for the BlackBerry won't work with the iPhone 4 since it has a different plan. Is this true? I don't come anywhere near 2GB of usage per month but I'd still like to know. 2. Also, since I won't be eligible for an upgrade until this December, I'm going to use the upgrade eligibility from the other line in my household. So I will be doing an upgrade swap. If I were to pre-order from AT&T's website, how would I do the upgrade swap/activation at home once my iPhone 4 arrives?