We have been customers of Consumer Cellular for 3 years. They use the AT&T network and with the addition of more towers by AT&T in TV we have had excellent service plus we spend less and have no contract. Their phone selections are not the latest and greatest, but they have added several smart phones to their line up. You can check them out at
www.consumercellular.com. Their US based reps are great and the service is better than some of the big players. They are senior friendly.