4K Set Top X1 Box
I currently have the XG1v3 X1 box and purchased a 4K TV. I understand I need the v4 box to gain 4K support. The info on the Xfinity help site said that when trying to play 4K content the box will bring up an error with option to get a compatible box. I followed the instructions by saying "4K" into the Xfinity Remote and selected a 4K movie to watch. I did get an error that said the cable box was unable to play 4K content, but had no option to request a compatible box.