So I was trying to active FXNOW on my Nexus Player, and Comcast was not listed as a provider. I found this workaround on the fireTV subreddit . I tried it multiple times to no avail. Today I decided to give it another go, and when I launched the FXNOW app, it was magically activated. So the workaround must have worked with some delay. Just thought I would share in case anyone is in the same boat w/ Comcast.