Sprint has plenty of bluetooth phones, never fear. When buying one though, you'll want to make sure you get one that has EV-DO Rev. A, which is the fastest mobile broadband they offer. This is probably the mobile broadband you use with the card you have for your laptop. The question is more of how Sprint is going to do the whole data plan thing. If the data plan covers every phone on your account, then a new phone on the account with bluetooth will let you use the mobile broadband at no extra charge on your n800. If the data plan is specific to the sim card that is in the laptop card, you might have a bit of a problem, since they might want to force you to buy an entirely new data plan to cover your phone as well. This is what AT&T wanted to do to me, but they are a bunch of horrible horrible people, and it's better to not get me started on that rant. Anyway, what you need to do is talk to Sprint about this, I wouldn't call them since you are likely to get some person insulting your intelligence and reading off of a bunch of cue cards, instead walk into a Sprint store and talk to one of those people about it, just don't start talking about the n800 specificly, since they won't know much about it at all (Sprint is planning to release a n800 with WiMax sometime next year, and they might think you are refering to that, if they even know about it)