In the boonies, Verizon is the only one that is almost totally reliable... I have worked far from the metro areas nearly all of my life..... I tried all of the other carriers... Remember "Voice Stream?"
Well, I tried them too before they vaporized into nothingness. Went from that failure to Qwest which in metro areas is totally solid, but get outside in the boonies where only the wolves roam, nearly all of them fail....
Verizon is not 100% global like a satellite coverage would be, but it is the next best thing.... I have been with them now for over 15 years, and not going to change. That don't mean it is the best for everyone....