I’m not sure I believe you? (Not that I can’t believe a company would do something dodgy behind your back, but I just don’t think our phones would go that far off piste - opening a wifi network has battery power implications that I think would have been discovered/widely known before(
Comcast / Xfinity definitely does this. I have gotten many 'suspicious activity' CAPTCHAs on popular websites because of this and the routers provided by Xfinity are very locked down so you can't do anything about it.
Let's not even get into WiFi Motion which I'm sure is enabled by default in most households [1]
I've told myself if they start putting 5G in TVs I would either glue a faraday mesh to the back or open up the TV and ground out the antenna or remove the WiFi chip if possible.
If they would keep the spying to matching my shows with programs that are being aired or on popular streaming services, sports, or whether I mute the commercials, that wouldn't bother me. Screen grabs would , especially if I use it on my computer. But history has shown this starts off benign and eventually devolve into listening to the room at all hours and keeping it forever in a Bluffdale data center because "think of the children" / "national security".
I opened up my LG TV because I saw it doing aggressive wifi scanning even when the wifi was "disabled" and physically removed the antenna wire and wrapped the whole guts in RF blocking foil.