B.P.
Radio Shack and places like that sell something called a wireless signal booster....it has to be mounted on your roof but is supposed to helpful with cell phones and wireless internet. The guy at Radio Shack said it only works if you have at least one bar of signal on your phone, if you get no signal at all, then the booster will probably not work. It runs about $300, which is why we haven't gotten it yet, so I can't really tell you how it works. On the Radio Shack website, they have customer comments to will give you some insight.