At least you have an asterisk key. A Samsung TV remote doesn't have one. As far as I can figure, you just have to back out and select a new channel from the guide. Even navigating the guide is slow. There is no way to page up and down. You just traverse one channel at a time. That being said, it is only a beta app that works like any other streaming service. You plow through the available content and select a show. All in all a great start.
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