So your saying you dont have internet in your house?
I'll try my best to explain my situation in english...
My internet connection its not wi-fi, its not wireless, its cable.
my xbox is on the second floor, while my pc with internet is on the first, they are really far away from each other.
if I want to connect it via cable, I would need to perforate a lot of walls to make it reach the modem, no one would allow that.
and if I want to make it via a wireless modem, I fear the signal wouldn't be strong enough to reach the xbox, since its just 300 kb/s.