Make sure your iPhone and Samsung TV are connected to the same Wi-Fi network
Turn on your Samsung TV
Open Control Center on your iPhone
Tap Screen Mirroring
Select your Samsung TV from the list
Enter the AirPlay code shown on the TV if prompted
Wait for the iPhone screen to appear on the TV
If your Samsung TV does not appear, enable AirPlay on the TV in Settings
If needed, update your Samsung TV software and iPhone iOS
If AirPlay is unavailable, use a compatible third-party mirroring app or an HDMI adapter