Verizon - good signal but watch how they bill you
ATT/Cingular - you can use phones from home since they run SIM card
Sprint - good signal but then the Company isn't very profitable and you can't use SIM card. They have okay phones.
thanks a lot, I used sprint, and kind of thinking renew the contract. I am living in St Louis though, they offer 10% discount on every month's bill for two years.