c. USB 3G/4G Modem
You can connect to the Internet using a USB 3G/4G modem. Insert your SIM
card into the USB modem Plug the USB modem into the USB port of the router.
Once it has been detected, the 3G/4G modem section will be activated and you
will be able to set up your USB modem.
Be aware that some modems work in host-less mode, which will be configured
through Tethering but not 3G/4G modem.
Click Auto Setup to create the connection.
You can also click Manual Setup to set up manually.
In General, you can set up by the three basic parameters below. Click Apply to
connect.
• Device: Choose /dev/cdc-wdm0 if your modem supports QMI, otherwise
you need to choose /dev/ttyUSB, which may include several ttyUSB from 0
to 3. You need to choose the correct one based on the modem spec. We
suggest you try ttyUSB0 first.
• Service Type: Indicate the service type of your SIM card.
• APN: Confirm with your SIM card carrier.