S ShadowyFlows Guest Sep 18, 2020 #1 Sep 18, 2020 #1 Hi. I’d like to upgrade to a 4K cable box. How do I get the ball rolling on that? Thanks. "4K cable box upgrade.," is about XFinity-Comcast Television. For other news regarding 4K cable box upgrade., and XFinity - Comcast Television, see our recommended stories below.