I went into an AT&T store yesterday to upgrade my plan from "IPHONE + 200" to "IPHONE + 1500". When I checked online to see if the change had gone through, it said "Check back after your next billing cycle begins on 5/24/2008." Has anyone made this change before? Do they charge you $0.01 per KB and $0.20 per text for the rest of the cycle? I just don't want to get a $5000 bill this month.