My Cell Phone Problem

I don't have a cell phone back in the States, because I'm already paying for a landline and DSL and don't need another bill to pay just now. Occasionally I consider getting a prepaid cell phone, just to get used to the thing and for the occasions when it would be handy for people to be able to reach me when I'm not at home. (When I went out of state to visit a relative at her new home, for