I mistakenly hit cancel my subscription on my sling tv and it popped up a window where they are giving away free Amplified HDTV antenna to watch free on the air channel if you prepay for 2 months subscription. Once you prepay SlingTV will adjust your billing and refund back broken month remaining balance.
I mounted my antenna today and picture quality is impressive. I even hide it behind my wall mount.
https://www.sling.com/