I am currently using the B311 Wireless Router which comes with the Three HomeFi package.
It is a Huawei product very like the B315 but has only one Ethernet port at the back.
I have connected to this a Poynting 4G-XPOL-A0001 Antenna
My speeds, with Three, are 100Mbps down and 30 Mbps up but the mast is only a mile from my house.
My ADSL speeds were 1.5Mbps down and 0.5Mbps up so I just got the telephone line disconnected as no hope of fibre.