SIM ERROR
If you get the SIM ERROR message in the Status/Overview menu (dashboard) at the SIM ID value,
then your SIM card is inactive or has malfunction. Restart the router and try again.
Add valid APN settings in the Interfaces / WAN connection, Save and apply the settings and
restart the router as soon as you can from the System / Reboot menu.
If it does not help, consult with your Mobile Operator and ask about the SIM availability and ask
them about the network registration in their system (the mobile operator can check the module
registration in their system).
SIM/APN failure
It means a SIM or APN failure, if the LED2 will not light for minutes. If the device is not registering
to the network, then the modem was not initiated properly, and the router will restart itself after 10
minutes.