At one of my parents house the BT Home Hub wifi keeps dropping it’s connection, I have tried the hard reset and even pressing the Wireless association button on the back. Still wasn’t holding a steady signal for my wifi devices.
There is an excellent online resource if my solution dosen’t help you, my BT Home Hub is quite old the white one from a few years ago so your settings might be fifferent but my solution is pretty simple. You can find more help here - www.filesaveas.com/hubhelp.html
Open up http://bthomehub.home/ in your browser login (default password is either admin admin or admin password) goto Basic Config/Wireless change the channel selction from automatic to manual and select channel 11. This worked for me no more dropped Wifi..