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
on page 70.
Table 6. Alert messages
Description or Solution
Alert Message or Code
SIM card alerts
Ensure that the micro SIM card is installed correctly. See
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
on page 54.
SIM Locked
Temperature Alerts
The modem is designed to work over a wide temperature range. (For more information, see
on page 92.) 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 Solution
Problem
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.
on page 87.
Make sure that your mobile broadband account is active.
Make sure that the SIM card is inserted correctly into the modem (see
on page 8).
If SIM security is enabled, make sure that you entered the PIN correctly to unlock the
SIM card (see
Enter the SIM PIN to Enable the Modem to Connect to the Internet
on
page 50). A locked SIM card prevents the modem from connecting to the mobile
broadband network.
Alerts and Troubleshooting
83
LTE Modem LB1120 and LB1121
