This works neither on the web nor on the Xfinity app. Clicking Add/Manage Premium Channels just gets redirected from one URL to another and eventually shows an error page saying, "We're sorry. It looks like you'll need some help completing your order." This has been broken for who knows how many months. There is other broken functionality on the web site, too. Looks like there is not much regression testing of the web site. Adding new features to the web site or app is probably breaking older ones.
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