Although using Wi-Fi will provide a better experience, if you want to screen mirror without using Wi-Fi, you can do so by using a wireless display technology like Miracast or Chromecast. This creates a direct connection between your sending and receiving device.

However, a screen mirroring your iPhone onto a smart TV requires Airplay or an HDMI port, as Miracast only supports Android devices.

Can you screen mirror without Wi-Fi? "Yes".

Link Here

Although using Wi-Fi will provide a better experience, if you want to screen mirror without using Wi-Fi, you can do so by using a wireless display technology like Miracast or Chromecast. This creates a direct connection between your sending and receiving device.

However, a screen mirroring your iPhone onto a smart TV requires Airplay or an HDMI port, as Miracast only supports Android devices.

Can you screen mirror without Wi-Fi? "Yes".

Link Here