GL-INET Opal User Manual

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2.3. 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.
In General, you can set up your 3G/4G modem 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.

GL-INET Opal Specifications

General

RAM	128 MB DDR2
WiFi	802.11b/g/n
USB Port	1 x USB 2.0
VPN Support	OpenVPN, WireGuard
Operating System	OpenWrt
Processor	QCA9531, 650MHz
Flash Storage	16 MB
Ethernet Ports	2 x 10/100 Mbps
Power Input	5V/2A