Anyone have a good way to take advantage of the 3 year BB replacement plan? When I bought the plan last July, the salesman told me that I could upgrade and pay the difference at any time. Today when I tried to upgrade my A460 to the 8100, they made me go to a sprint store and have them run diagnostics and came to the conclusion that the phone was fine adn wouldn't let me upgrade Any help would be appreciated. I never would have bought the service plan if they were not going to let me upgrade.