Still not too sure about prepaid cellphones. This is the one that will change the your mind. The Senior Value Cellphone, Samsung T155G, is designed with seniors in mind. Also known as the SVC, it is affordable for under $15, service for under $7 per month, nationwide coverage, no contract and no activation fee. It's by Trafone, the largest no-contrat cell phone provdier in the U.S.