If Smart IPTV isn't available in your TV App Store, follow this guide to install it manually using a USB stick.
Unzip / extract the downloaded file. You'll get a folder named SmartIPTV.
Inside the SmartIPTV folder, you'll find two folders:
Copy both folders to the USB root / main directory.
Insert the USB stick into your Samsung TV USB port.
On your TV, go to HOME / Smart Hub → My Apps. You'll see a new app called "FINEST IPTV" or "SMART IPTV".
Open the app. Find and copy your TV MAC address from the display or settings.
On a computer or phone, visit the playlist upload page:
Paste your copied MAC address in the "MAC" field.
Add your M3U Playlist link in the "URL" field.
Restart the app — your channels will load. Enjoy!