Check if your handset supports this by going to More connection settings→Hdmi mode→And select Samsung Dex mode...Also for Desktop/ Laptop you just need Type-c to charging Cable only but for most of the Led TV you still need Type-c to HDMI cable and further it works for Windows 7 or 10 only on desktop/Laptop but you need to download the Dex. exe file & need to install on your System(Laptop/Desktop only)...
