You don't have to go nearly that far. Even within a dense urban area, I can go up the hill 10 minutes from my house in the Oakland hills and the various small v

You don't have to go nearly that far. Even within a dense urban area, I can go up the hill 10 minutes from my house in the Oakland hills and the various small valleys in the hills have no cell service. Now I have a Delorme Inreach satellite messenger so I can stay connected, its cost prohibitive to use excessively, however.