Recently I purchased sling tv subscription for 3 months. I was enjoying it on my mobile devices and computer. I wanted to use it on my smart tv, but I was unsure about how can I activate sling on my smart tv. I found this post on sling com/activate. By following the steps in the post, I was able to activate my sling subscription on my vizio smart tv. You can try following the steps from this post and now I'm enjoying it on my smart tv.