It should be fairly straight forward to do. Go to quick settings on your phone (pull down, 2 swipes from top edge of screen) then scroll over to Smart View icon on screen. Turn that on and you should see something on TV screen...like "phone wants to communicate" (or something like that); say yes;
Next thing you know, your screen is being cast to your TV...
Something else to try doing is using DeX; icon should be near the Smart View icon; using that mode allows you to still use your phone while your using your video function on your TV... Very cool. Not hard to do. - - You might want to check out Dex for S20 on Youtube. It will explain it in detail.
For some reason when I tried this yesterday it wouldn't connect. It found the TV but then it told me it couldn't connect. Today it went right through. That was the bedroom TV. The front room TV is being replaced tomorrow.
