Recently I've tried to activate the NBC Sports App for a third generation AppleTV. Now while I had no problems doing it for my Roku & Fire TV Stick, I have not been able to do it for my AppleTV. It doesn't matter which platform(Windows, Mac, Linux, or Kindle Fire) or browser that I use, it just won't work. This is a recent phenomenon for AppleTV, my inability to activate the device through my provider. It just won't send me to my provider to sign in, even though my provider is listed. The Kindle Fire is the worse. When I attempt to put in the code, it starts adding letters on its own, & keeps adding new letters no matter if I try to delete them. They don't delete, they multiply. Seeing that you have to reactivate the app EVERY MONTH, it would suck if I start to have the same problem with my Roku or Fire TV Stick.
