I realise that front line telephone IT support is the most life-sapping job in the world, and BT are most likely often talking with people like my mum who doesn’t know a router from a toaster, but they really have no way of changing gear.
I have a HomeHub5, constantly dropping wifi too. Channels were separate, different SSID, I’d swept the local wifi channels from neighbours and tried choosing unused channels and so on. Broadband totally stable, Ethernet devices stable but wifi kept dropping on both 2.4 and 5ghz, including when one channel was turned off.
I called explaining all of this, and the guy on the other end says he’ll start by checking my line. No need I say. He says there is, and puts me on hold. Comes back online to say he’s checked my line and reset the connection to the exchange and he’s fixed my wifi. I offer that’s an insane suggestion and explain that won’t make any difference, that I think the router is borked, he insists otherwise. It was a strange conversation, I screenshot it for prosperity.
Ten phone calls later, I was sent a new HomeHubThree and then five more calls later a new HHFive. No dropped wifi since.