We recently purchased a 4G router to evaluate it and to see if it provided better connectivity.
The ideal feature about this device is the sim-card-slot on the back of the device. Plug in and ready-to go
We used an EE SIM and when plugged in provided immediate 4G access via the LAN cable. You can setup wifi connectivity as well as hare access via the 4 lan ports.
Our first outing was where we streamed 10 games over a two-day period, with a data usage of 26GB. We had no drop-outs and a stable stream over the period.
In our location we managed a 22Mbps upload spend, ideal for two streams uploading at 1.5Mbps each.