I can use AppleTV to watch most channel I usually watch including my Xfinity cable plan, like ABC, NBC, AMC, HBOgo. I start with AppleTV 3 in 2015. It worked fine. Now I'm using a New AppleTV. It's a little bit different from the last generation. You need to add the channels by yourself from AppStore. The channel App you download must included in your cable plan. After install the channel App, you need to activate it online then you can stream the show on your AppleTV. For example, you have HBOGO in your cable plan, so you download and install the HBOGO App. At the first time you open the App, it ask you to login, it'll show a code on your screen. You need to grab your iPhone, iPad of laptop to go to the URL www.hbogo.com/activate/ , then choose device/AppleTV, cable provider/ Comcast Xfinity , enter the code, then you need to login with your Comcast account. If you lucky, you can stream HBO show on your AppleTV. Because recently I found the channel App often logout automatically. When I try to login again, sometimes it's not work. When I run the activate process, it will lead me to a page says: "this network is not included in your current Xfinity TV service " I don't know why, but it happens occasionally. I called the support, they said it's network problem and will transfer the call to a special line to fix it.
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