Our 5G antennas work for all UK 5G mobile phone networks and all of these antennas are backwards compatible with existing 3G and 4G networks. If your 5G router is installed in a location with a poor 5G mobile phone network signal, but there is a better 5G service close-by then installing a 5G antenna at the location where there is a better 5G signal may help to improve the router 5G performance.