USB Tethering
Your smartphone (depending on models/compatible OS version) can be used as a wireless modem to share its mobile data connection with the TV via USB cable.
Your TV will automatically detect USB Tethering connection if a compatible mobile with USB Tethering turned ON is connected.
To confirm your USB Tethering status
Press HOME, then select [Preferences] [Setup] [Network] [USB Tethering Status].