It is crazy I know.
We have been on ATT forever for broadband, now fiber, in our neighborhood. We went Comcast for cable for years and have been happy with their service. We started having problems with the image freezing on Comcast. I took a cable box into Comcast to get it fixed. They swapped it out for a small wireless Comcast receiver. It worked so well vs. the wired box, that I took the second Comcast box in and it worked, too. My two TV’s are now wireless on Comcast Xi5-P wireless boxes. I no longer have Xfinity cable per se. All my Xfinity is wireless. Everything else is on ATT. I have no idea how it works or what is connected to what. It is so hard to talk to anybody at any of these companies!