The higher speed part is short but I think you will still get overall better performance. Most of the phone companies are selling hot spot portable boxes with so called unlimited data but can't swear by them never used them. I just pay for a data plan on my iPad usually get service anywhere with occasional dead spots on the road. Some of the phone companies are offering Home network over their phone network. I think they come with some better antenna stuff for home which should offer better service than your phone.
What is nice is that you can do things to the modem to improve its function and “reception” versus a smart phone or tablet as a hotspot.
The modem that I saw came with a router/wifi and an elaborate antenna system. You can add the antenna to a tall pole and aim it for best reception. As far as network and LAN is concerned, you could probably use your own router/wifi although the solution sold one with the modem as as part of a solution.
Telephone data is probably slower than home based cable or dsl but it is better than nothing for rural folks and way better than dial up. Some people are even able to stream netfilx.