If the 3G/4G/LTE connection is not working on your Vigor Router, try the following steps to troubleshoot.
Check if the USB modem is in the Support List
The supported models vary between firmware versions. You can find the latest USB dongles supported by the router by going to Application >> Modem Support List in the router’s user interface.
Make sure the Access Mode is correct
Note that Vigor Routers provide two access modes, PPP and DHCP. The selection affects how the router exchanges data with the dongle, and the wrong settings may cause the connection to fail. Check the Support List to find the right one to use, or just try the other one if the current setting is not working.
Upgrade the firmware to the latest version
The latest firmware includes improvements and fixes to known issues. If the router’s firmware is not the latest version, upgrade the firmware and try again.
Check the validity of your SIM card
Make sure you are using a valid SIM card that has not expired or has used up all of its data.
Enter the right PIN code
Check if you have entered the right PIN code. Leave the PIN code field blank if the SIM card does not have one, which is also quite common.
Check the WAN configuration
Confirm the configuration in WAN >> Internet Access again. Make sure have entered the APN, username, and password that your ISP provided.
If none of the above solved the issue, please provide the following information to our Technical Support team for further analysis.
- Model name of the router
- Firmware version
- Model name of the USB dongle
- PID/VID of the dongle
- Access Mode of the dongle (PPP/DHCP)
- APN Name (Required from ISP)
- If this dongle has a project driver
- Does it work with any other Vigor Routers?
- If this dongle is ISP SIM card restricted
- The WAN Syslog