We get a BT 4G Assure with the smart hub which is under the packaging a Huewai usb dongle which kicks in automatically if this broadband fails (it also reports back to BT that there is a fault on the line). The problem is that this will not work if the BT Smart Hub is in bridge mode.
I have spoken to the BT who say no way they know of to get around this. The 4G assure stick is attached to the BT Smart Hub, I have been told that it cannot be used with a different device. When I connect it directly to my computer the Haewei control panel sees EE login details.