2.4.7.4
Check SIM Communication
Some modems will support dual SIM interfaces, typically with a solder down SIM on
the modem along with the 3FF SIM interface. Users should check the datasheet for
their device for instructions on selecting their desired SIM interface.
Verify that the modem can read the SIM card by issuing the AT command for your
specific modem family located in the chart below.
If the modem responds with
ERROR
or "
+CME ERROR: SIM failure
" please check
that the SIM is properly seated, that the correct SIM interface is selected(if the modem
supports dual SIMs), that cellular functionality is enabled (AT+CFUN=1), and verify
that the SIM does not require a PIN. If it still responds with an error, and further
assistance is needed, please contact NimbeLink for assistance.
PN 1002634 REV 1
© NimbeLink Corp. 2021. All rights reserved.
16
Modem
Command
Response
NL-SW-LTE-TC4NAG
NL-SW-LTE-TC4APG
AT+ICCID
+CCID: xxxxxxxxxxxxxxxxxxxx
OK
NL-SW-LTE-GELS3-x
AT+CCID
+CCID: "xxxxxxxxxxxxxxxxxxxx",""
OK
NL-SW-LTE-QBG96
NL-SW-LTE-QBG95
AT+QCCID
+QCCID: xxxxxxxxxxxxxxxxxxxx
OK
All other modems
AT+CCID
+CCID: xxxxxxxxxxxxxxxxxxxx
OK
