unlimited plan? I'm interested in getting the Motorola i1 phone, but I can't seem to find it anywhere other than Best Buy. The only option Best Buy gives on their website is to add this phone to a Sprint plan, which I don't want to do. The Boost Mobile website says that the Motorola i1 is "in stores only". Would it be possible for me to buy the phone at Best Buy, or another retailer, and use it with Boost Mobile's $50 unlimited plan (as advertised)?