Campbell Scientific 9522B Iridium Satellite Modem and COM9522B Interface Modem - Manual (Page 38)

Appendix C. Unlocking a SIM Card
The next step is to enter the PIN code for the SIM card.
AT+CPIN=”1111”
The modem should respond with an “OK” which means the PIN code has been
accepted. This explanation assumes that the default code of “1111” is being
used. If you get an “ ERROR” reply, be sure that the command was entered as
shown. If you continue to get an error response, contact the SIM card provider
to determine if a different code is required.
The next step is to enter the command to deactivate the PIN code requirement.
If your PIN code is different from the “1111”, use this in the command in its
place.
AT+CLCK=”SC”,0,”1111”
The modem should respond with an “OK”, which means the command has
been accepted. If you get an “ ERROR” reply, be sure that the command was
entered as shown. If you continue to get an error response, contact the SIM
card provider for further information.
The final step should be to test that the SIM card is unlocked and will remain
unlocked. Start by powering down the modem and then reapplying power.
Allow the modem to warm up for about 30 seconds. The test consists of
attempting to dial the 12-digit data number for the other SIM card in
DevConfig.
ATDT00<12-DIGIT DATA #>
If you are able to dial the number without getting a prompt for a PIN code, then
the code requirement is deactivated. The modem should respond with “ NO
ANSWER” after several seconds. This assumes the other modem is not
communicating.
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