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Chapter 7 – Security Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 41
Example:
Three failed PIN validations + one successful PUK validation
AT+CPIN?
+CPIN: SIM PIN
Read the PIN status
The product requires SIM PIN
AT+CPIN=1235
+CME ERROR: 16
First attempt to enter a SIM PIN
Wrong PIN
AT+CPIN=1236
+CME ERROR: 16
Second attempt
Wrong PIN
AT+CPIN=1237
+CME ERROR: 16
Third attempt
Wrong PIN
AT+CPIN?
+CPIN: SIM PUK
Read PIN state
The product requires PUK
AT+CPIN=99999999,5678
OK
The PUK is entered, the new PIN shall be 5678 PUK validation is OK. New Pin
is 5678
AT+CPIN?
+CPIN: READY
Read PIN state
The product is ready
If the user tries to do something which requires PIN2 (CHV2), the product will refuse the action with a “+CME
ERROR: 17” (SIM PIN2 required). The product then waits for SIM PIN2 to be given.
Of course, if SIM PIN2 is blocked, SIM PUK2 is required instead of SIM PIN2.
For example, the product needs PIN2 to write in the fixed dialing phonebook (FDN) , so if SIM PIN2 authentication
has not been performed during the current session, SIM PIN2 is required
Command Possible responses
AT+CPBS=”FD”
Note: Choose FDN
OK
AT+CPBW=5,”01290917”,129,”Jacky”
Note: Write in FDN at location 5
+CME ERROR: 17
Note: SIM PIN2 is required
AT+CPIN? SIM PIN2
Note: SIM PIN2 is required
AT+CPIN=5678
Note: Enter SIM PIN2
OK
AT+CPBW=2,”01290917”,129,”Jacky”
Note: Write in FDN at location 5
OK
Note: Now writing in FDN is allowed
Please note that the product only requests PIN2 or PUK2 once. Therefore, if they are not entered properly, the next
+CPIN? command will return “+CPIN: READY”.