iOS 10.2 TV Single Sign On
You can forget entering your cable or satellite subscription information in every app that you can use it with once you install iOS 10.2.
In the settings section there is a new TV Provider sign on that lets you log in once with your provider and then with iCloud Keychain enables you will not need to sign into apps on your iPhone, iPad or Apple TV going forward. This means no more entering pairing codes to activate your subscription.
This works with CenturyLink Prism, DirecTV, DISH, GTA, GVTC Communications, Hawaiian Telcom, Hotwire, MetroCast, Service Electric Cablevision and Sling TV.