Siemens MC55 Command Set page 120

MC55 AT Command Set
5.4 AT+CLCK
To operate the mobile with other SIM card than the one used for the "PS" lock:
Enter SIM PIN of present card, followed by "PS" lock password.
AT+CPIN?
+CPIN: SIM PIN
OK
AT+CPIN="1111"
OK
AT+CPIN?
+CPIN: PH-SIM PIN
OK
AT+CPIN="3333"
OK
To deactivate the Phone Lock:
AT+CLCK="PS",0,"3333"
OK
MC55_ATC_V01.05
Confidential / Released
PIN authentication accepted.
"PS" lock password is required.
"PS" Lock password has been accepted. ME is fully
operational now.
Phone Lock password has to be provided again.
Now the mobile can be used with any SIM card, with-
out the need of the phone lock password.
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