Just tried it. I am on xfinity and indeed I cannot disable auto join lol. Dafuq. I have dual sim. Physical sim is with xfinity and esim from tmobile. I was wondering why my phone connected to fuckin xfinity shit while i was driving.
So now you better hope one of your neighbors doesn’t get a free wifi/modem combo from Comcast because it will advertise a hotspot by default and you’ll be in the same boat I am.