XG1v4 - A ( Xfinity Comcast 4K HDR New BOX ) Unboxing & Setup - YouTube
Viewing 4K via Comcast Cable: What You Need to Know
Comcast Introduces New 4K Streaming Device XiOne | TV Tech
Comcast on Twitter: "Comcast today announced the launch of Xfinity Flex, a new service available to all Xfinity Internet customers across the country starting next week, packaged with an Internet-connected, 4K HDR