If you are having trouble with your Netgear LB1120, please reference the following to address your difficulty.
See the full user manual for the modem here.
By default, when the modem powers up with a SIM card installed, it automatically searches for and connects to your network provider’s mobile broadband network. This process might take several minutes. The SIM card that is installed determines the mobile broadband network to which the modem connects.'
If the modem does not automatically connect to the mobile broadband network after 10 minutes, the Power LED remains solid amber, please conduct a modem reset by holding down the reset button on the back of the modem for 15 seconds, release the button and wait 1 minute for the modem to reboot.
To access the modem's user interface, please make sure you are connected to it via Ethernet cable, open a browser and navigate to 192.168.5.1. Enter the alpha numeric password found on the bottom of your modem.
Once in the user interface please check the connection status and verify it shows "Internet Connected."
To view the status of your modem click on Settings>Mobile>Status Details
Once you are in the status page you can see the live signal status for your modem.
Please verify the status shows "Connected", and the PS service type shows "LTE".
RSRP is the signal strength of your connection to your servicing tower.
Quality measures the signal quality and can be effected by physical obstructions as well as signal strength.
Current radio band indicates which frequency you are connected to the serving tower on.
ICCID is the unique identifying number of the SIM card that is installed in your modem.
If no information is populated, this would indicate that either the SIM card is improperly installed. See this guide to re-install your SIM card.
Your modem may also require a software update. For software update instructions please see the instructions here.
If trouble persists after reinstalling your SIM card, please email firstname.lastname@example.org with a brief explanation of the issue, along with a screenshot or picture of the modem status details page and a speed test run at www.nperf.com to open a support ticket.