I believe you're looking for the SmartThings app instead. This is supposed to facilitate reverse screen mirroring, ie watching my TV from the bathtub via my phone -Galaxy S8. My Samsung Smart TV was the first series that introduced the reverse mirroring feature. However, I'm told that SmartThings app from Play Store is what allows ANY compatible TV to reverse cast TO phone like this. Please let me know if this works for you.
... View more