We travel a lot each year in the eastern half of the USA now as we got tired of traveling the western half other than to Alaska. Constantly hear fellow RV'ers complaining that they can't get service with T Mobile, Sprint, and the others while we have full 4G standing right next to them with Verizon. They usually scratch their heads or quit trying and when we see the same people again, most have changed to Verizon. Many have made a point of telling us that seeing is believing and some thanked us for the actual heads up true on the spot comparison they seen with their own eyes! Yet to hear any of them say they aren't very happy they'd switched. You will only get what you pay for. Cheap out, get less!
Verizon has by far the most towers of all and 4G with good signal is the norm almost everywhere.
We have 2 smart phones, a tablet, and a MIFI Jetpack for our 2 laptops we take along and have 6 GB of data bandwidth and it's real cheap at just over $110/month with our Verizon retirees plan. For a few bucks more/month, we can have unlimited data which we do when in Florida for about 2 to 2-1/2 months then change back to 6 GB when back home. We had the MIFI system all the way back when you had to cable tether it to a laptop with Alltel and Verizon bought Alltel and we had right away upgraded to the MIFI wireless Jetpack about 7 or so years ago and it works great anywhere and can have up to 10 devices connected to it all by password so very secure and not available to non-wanted or leeches! Wouldn't leave home without it!
The other plans seem to be fine for those who never venture far from home or off the Interstates and away from big cities but still want wireless service anywhere. What the heck good is a cellphone when needed or in an emergency and you have no service anyway! Think about it! About as good and smart as an anchor thrown overboard with no line attached! Pennywise, pound foolish but it may only be your live or family at stake!