I have two 4G routers, one pointing at a Voda mast giving me 20mb and the second pointing at a Three mast giving me 50 to 60mb, they are positioned in the best place for the signal and connected to outdoor directional antenna. Distance to both masts is 3km but they are 2km apart so if there is a power outage only one is likely to be affected. Both 4G routers then feed into a Draytek 2925 some 20M away which is dual WAN and the WAN's are load balanced by the Draytek. All the house is networked to the Draytek, the 4G routers are bridged but I leave their isolated Wifi on so I can connect for admin. End result is a fast connection with built in redundancy, 2 weeks ago the Three mast was down for 3 or 4 days, guessing it was power cut as the EE shared signal was down too, did not affect the network except for speeds downloading large files. Alternative is BT ADSL on a failing copper network with constant monitoring needed and regular call outs for water logged lines.