In my experience, your coverage will depend more upon the specific model of phone you purchase than with the network you choose to go with. For example, my father had one of the newer Blackberry phones on Sprint service, and got no signal at my house. My 4-year-old Sanyo phone (old enough to have the retractable antenna, but still has a camera and external LCD, etc.), also on Sprint service, gets full bars. Also, a cheap Motorola C139 from AT&T GoPhone had a lousy signal in many places that my friend’s AT&T phone worked just fine in.