WiFi coverage in the house is shocking!

[#1]

If I move around 20ft away from my router I lose all WiFi. We don’t get it upstairs at all, only live in a 3 bed house!
Router is based by the tv, at the front of the house, it’s a through room, but still 20ft away all WiFi disappears!
Any ideas why?

[#2]

Hi @Myasophie1980,

I can see that we have responded to your other thread here. Moving forward, we'd ask that you please contain any queries you may have about our services, or any issues that you're experiencing, to one thread so that we can get in touch as soon as possible and with a clear and consistent answer.