Is T-mobile the only US company at the moment compatible with the Sony camera phones? (the C-series)? Nobody else uses SIM cards anymore?
Also best service can be narrowed not only to your state, but to your town, or even your block in town. Like for me in Detroit, at my Wayne State campus Verizon has the best service, giving me atleast 1-bar in the basement of buildings!
Just 3 blocks down at the Henry Ford hospital, the best service there is AT&T, where for them they can get a signal from anywhere within the hospital. Though most likely cause the hospital has a contract with them; in putting a sat. tower installed nearby.
So while havingusing my own phone with T-mobile is tempting, I'd like to be able to answer my phone in the basement of the buildings I use often. So I am stuck with Verizon.