I know this is an odd question, but a friend of mine and I have been debating over whether I will keep unlimited data if I use an upgrade next December. He says that a store manager said that anyone currently with unlimited data will have to bump down to a tiered pricing plan, while I believe it sticks... My mom upgraded 2 weeks after the tiered pricing same out and she kept her unlimited data on her iPhone. Anyone know how data is going to work for future upgrades?