You can mirror your phone's screen to most TV's that are on and connected to WiFi. iPhone and Android phones work a bit differently, so here's a quick tutorial on each.

iPhone

On your iPhone home screen, pull down on the top right of your screen to reveal the settings. You'll see a button for Screen Mirroring. When selected, it will display a list of TV's that are on and connected to WiFi. Select the TV and you'll see a mirror of your iPhone screen. Then open Salut on your iPhone. 

 

Android

On your phone's home screen, pull down on the screen to reveal the settings tray. You'll see a button for Cast. When selected, it will display a list of TV's that are on and connected to WiFi. Select the TV and you'll see a mirror of your phone's screen. Then open Salut on your iPhone. Alternatively, download the Google Home app and tap on the TV you want.