If you have a really good signal, then i guess you would be fine, in terms of bandwidth. Dunno what it would do to your data limits though...
I run xbox live using a T-mobile USB internet stick and it works with Halo 3 but i often lag out, theres alot of lag. If you are stugling what to do to get it running just ask
You can if you have a bottomless pit of money, because it will be really expensive.

TL;DR = get a router and a cheap broadband connection and save yourself the hassle of lag and huge bills.
Posted from Ubuntu.

Squier Precision Bass Special in Antique Burst (LH)
Rotosound Swing 66s, 45-105

On slapping on a bass:
Quote by supersac
pretend its a woman
i have no helpful advice