@hran wrote:I want to see my smartphone screen on my TV.
Which function can I use?
Hi @hran, welcome to the Community 
Indeed you can screen mirror your smartphone onto a Smart Tv , for modern devices best to use either Smart View or Smart Things which many do successfully. Your phone and Tv need to be on the same Network.
Set up should not take too long, see more detail here:
https://www.samsung.com/uk/support/smart-view/
https://www.smartthings.com/uk
https://www.samsung.com/in/support/tv-audio-video/connect-tv-with-mobile-via-smartthings/
Some other options here, though most of them not as convenient.
https://uk.pcmag.com/gallery/120867/how-to-connect-your-android-phone-to-your-tv
