If the modem is still searching for the network, the response to the AT+CEREG?
command should be:
+CEREG: 0,2
OK
If the modem's registration was denied, the response to the AT+CEREG? command
should be:
+CEREG: 0,3
OK
A "registration denied" status is a good indication that the PDP context was set
incorrectly, or that the SIM is not active. Verify that the APN was set correctly (if
applicable), and that the SIM is indeed activated with your cellular carrier.
If the modem's registration status is unknown or indeterminable, the response to the
AT+CEREG? command should be:
+CEREG: 0,4
OK
This status is a good indication that the signal quality conditions are too low, and the
modem is unable to connect.
Verify that the J12 antenna connector is properly seated in the modem's X1 connector,
and ensure that the testing area has acceptable signal quality. Moving closer to a
window, or outdoors can help to improve LTE signal quality.
also has information on the signal quality AT command that can help to
identify low signal quality problems.
If the modem is registered and roaming, the response to the AT+CEREG? command
should be:
+CEREG: 0,5
OK
Please refer to the Skywire Nano AT Command Manual for more information regarding
the AT+CEREG command and all others:
PN 1002398 rev 1
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