DO NOT DEPEND ON PHONE BASED GPS service. It is lacking at best. I travel rural MO a lot visiting clients. You can not beat a Garmin Nuvi with lifetime updates. I have seen family and friends get lost trying to use the phone based crap. We still have the Galaxy S2 and love them, haven't had a need to upgrade yet. We use ATT, but just because we're already there. Verizon will be a good service as well. Keep in mind, you will not be helped with a GPS in counties that still do not have 911 service like Bates County.