Community Forum
I think we have the latest Xfinity equipment, but WiFi is not available in room farthest from router. How do we extend wifi to whole house?
Some tips for improving WiFi performance;
http://corporate.comcast.com/comcast-voices/10-ways-you-might-be-killing-your-home-wi-fi-signal
https://www.xfinity.com/support/articles/improve-your-wireless-home-network
There are other options. Google for WiFi repeaters / range extenders, WiFi mesh systems / pods, powerline ethernet adapters, MoCA adapters. Good luck !