Here is a mobile broadband network kit that provides you with faster G LTE connectivity. The Lippert WiFi On-the-Go 4G LTE kit offers speeds up to 150Mbps. It comes with weatherproof 4G antennas. It is compatible with 4G LTE bands 2, 4, and 12.
The WiFi On-the-Go is compatible with T-Mobile & AT&T networks. More info is available here.