Both AppleInsider and 9to5Mac are reporting that Single Sign-on has been activated for beta testers using iOS 10.2 and tvOS 10.1. If you're using those operating systems on the Apple TV, iPhone or iPad, you can head over to the settings pane and enter your provider details to get going. For now, the number of companies listed is limited to four: Dish, GTVC Communications, Hotwire and Sling TV. But now that Apple is letting folks in the real world kick the tires, hopefully it won't be long before we all get to play.