Has anyone upgraded their cell phone through Amazon Wireless? I have Verizon and am due for an upgrade and Amazon offers the same phones that Verizon does, for a lower price and I would also be able to keep my unlimited data plan, if I go through Amazon. I tried a mock check out on Verizon and it is forcing me to change to the tiered data, but Amazon isn't. I was thinking about the Samsung Stratosphere and Amazon offers it for a penny and Verizon wants to charge $70 online, with a loyalty and online discount already included. Anyone use Amazon for this and if so, any problems? Thanks.