A fair few people keep them for receiving calls on or calling out on free numbers - I find that the sound quality is miles better than on a mobile, and my mobile signal frequently drops out where I live, though it can be great sometimes elsewhere and a completely transformed data speed elsewhere too!
Some people simply don't get a mobile signal at home at all. It's actually still a very patchy sort of network, @AmberParlsow.
Anyway, that's one aspect of diagnosis that you are not going to be able to do.
Staff try to eliminate all possible causes in case sending out an engineer turns up a fault with your own wiring, your side of the faceplate - that can mean you might incur a charge for the visit, if you haven't checked.
So do check the guide to master sockets that Ferguson posted to see if you can leave the router just plugged in at the test socket. That will help staff eliminate a cause on your side of the faceplate.
Staff will be on from around breakfast time in the morning.
Gliwmaeden2, a fellow customer.
