Here are a few of the larger more reliable VPN services.

Great proxy service

easy to set up proxy service

another easy to set up proxy service

Fantastic 3G 4G 5G coverage area tool and Internet speed test

This is a fantastic tool I just found!

You input an area, and the carrier, and it shows you on a multi-colored map where the coverage is and at what speeds it’s available at.

On the main page, there’s an Internet speed test tool, and a very good one! It shows latency, download, and upload speeds.