I want a home phone, how can I get one?

Hello,

So I want a home phone, because our mobile phone coverage isn't great in our house.

We have a router that doesn't have an RJ11 port, and we don't want to replace it because it's expensive and we use it for high bandwidth operations like streaming, VR, and so on.

I'm not too keen on getting another box that connects to the router to convert the VOIP to ethernet.

Is there a phone that can connect via WIFI to the router, without an extra physical box? A Home Base is fine.

It would be nice if there was multiple phones, too.