Alert Messages
The modem can display alerts to advise you of device status changes.The following table describes alerts
that might display. For information about how to view alerts, see View Alerts on page 73.
Table 6. Alert messages
Description or SolutionAlert Message or Code
SIM card alerts
Ensure that the micro SIM card is installed correctly. See Install the Micro SIM Card on page
8.
SIM Not Installed
Ensure that your network service provider’s micro SIM card is inserted in the modem. If a
problem still exists, contact your service provider’s customer service.The micro SIM card
might be damaged and need replacing.
SIM Error — Check SIM
The micro SIM card is locked. For information about unlocking the SIM card, see Unblock
the SIM Card With a PUK on page 57.
SIM Locked
Temperature Alerts
The modem is designed to work over a wide temperature range. (For more information, see Technical and Environmental
Specifications on page 95.) The modem shuts down automatically if it goes out of the supported temperature range.
If this situation occurs, move the modem to an area where the temperature is more suitable. If the modem is too warm,
make sure that the area is well ventilated and air can circulate around the modem.
Quick Tips for Troubleshooting
The following table includes tips for troubleshooting some common problems.
Table 7. Quick tips for troubleshooting
Possible SolutionProblem
Check with your mobile broadband service provider to ensure that good coverage exists
in the area.
You cannot connect to the
Internet over the mobile
broadband connection.
See also Troubleshoot the Mobile
Broadband Internet Connection
on page 89.
Make sure that your mobile broadband account is active.
Make sure that the SIM card is inserted correctly into the modem (see Install the Micro
SIM Card on page 8).
If SIM security is enabled, make sure that you entered the PIN correctly to unlock the
SIM card (see Unblock the SIM Card With a PUK on page 57). A locked SIM card
prevents the modem from connecting to the mobile broadband network.
Make sure that the Ethernet cable is securely plugged in.You cannot connect over an
Ethernet cable to the modem.
Make sure that your computer or device does not use a static IP address but is
configured to receive an IP address automatically with DHCP.
Alerts and Troubleshooting
86
LTE Modem Model LB2120
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