Chapter 46 Troubleshooting
VMG/EMG/AM/DM/GM Series User’s Guide
470
The SIM card cannot be detected.
1 Disconnect the Zyxel Device from the power supply.
2 Remove the SIM card from its slot.
3 Clean the SIM card slot of any loose debris using compressed air.
4 Clean the gold connectors on the SIM card with a clean lint-free cloth.
5 Insert the SIM card into its slot and connect the Zyxel Device to the power supply to restart it.
I get an Invalid SIM card alert.
1 Make sure you have an active plan with your ISP.
2 Make sure that the Zyxel Device is in the coverage area of a cellular network.
46.4 Internet Problems
I cannot access the Internet.
1 Check the hardware connections and make sure the LEDs are behaving as expected. See the Quick
Start Guide.
2 Make sure you entered your ISP account information correctly on the Network Setting > Broadband
screen. Fields on this screen are case-sensitive, so check if [Caps Lock] is on of off.
3 Check that the WAN interface you are connected to is in the same interface group as the Ethernet
connection (Network Setting > Interface Group).
4 Make sure you have the Ethernet WAN port connected to a Modem or Router.
5 If you set up a WAN connection using bridging service, make sure you turn off the DHCP feature in the
Network Setting > Home Networking > LAN Setup screen to have the clients get WAN IP addresses
directly from your ISP’s DHCP server.
6 If you are trying to access the Internet wirelessly, make sure that you enabled the WiFi in the Zyxel Device
and your WiFi client and that the WiFi settings in the WiFi client are the same as the settings in the Zyxel
Device.
7 Disconnect all the cables from your Zyxel Device and reconnect them.
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