We have Verizon cell phones and a Verizon air card. Only 2 places where we couldn't get service. Hot Springs, AR and way out in the boonies in AZ. Last time we went back to Hot Springs, their tower must have been upgraded because it worked fine that time. If none of the cellular companies invest in a tower, no cell service will work. There is one place in FL (Salt Springs) that there is no tower nearby and you have to drive to get service. Hope someone puts up a tower because we love it there! I have been coast-to-coast with my Verizon air card and most of the time I can get to the Internet. It is sometimes slow, but then I just wait until we move and it improves. Overall, we're very happy with it.