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Enhanced 4K on Xfinity: What’s New and How to Watch
4K Ultra HD (UHD) and High Dynamic Range (HDR) on Xfinity TV
X1 TV Box equipment types - Xfinity Support
Video settings on Comcast cable Box to view 4K UHD content
XG1v4 - A ( Xfinity Comcast 4K HDR New BOX ) Unboxing
How to get a Xfinity 4k - XG1v4 Cable Box?
Comcast To Launch 4K Ultra High-Definition Set-Top Box
Xfinity TV and Internet Equipment Guide: Order, Upgrade, & More
What is Xfinity Flex, and what does it offer? - Reviewed
Comcast to offer 4K set-top box this year - CNET