Tengo is the name of the outfit and connections were never good in AZ or elsewhere where we had to use their services. Our favorite campground near wife's Relatives is overloaded most week ends from kids all watching movies or I don't know. They haven't fixed the system in all the years we have been going there. You have to be close to the office or the one or two week antennas they have somewhere but it is "free."
We haven't taken the mifi on the road yet. Since Verizon is not. in that area and some in the west. We will have to see how it goes.