[TheLovatScout]

Like most others have said, even if you could, you shouldn't go through Sprint for Xbox Live connectivity. One, of course, it will be laggy not only for you but all who you play with, and really...no one will be having fun. Two, I actually don't even think Microsoft will let you connect. If your MTU is too low then you won't be able to connect. And I don't think Sprint will give you a high enough MTU to connect. I've connected my xbox using my laptop as a wireless router (although I have the Slim now and don't need to) but I can still show you how to do that if you'd like.

EDIT: Nope, you can not connect through Sprint.