When I had the fiber connection for my new internet run to my house, I told the tech I want the router/modem combo installed in the basement.

The guy strongly insisted I not do it, but then when I persisted I had to sign two waivers acknowledging that my wifi will probably be shit and the basement is a terrible spot.

I was just using their router/modem as a pass through, but man, they really don't want people putting routers in their basement. I can totally understand why too.