Sony CDM-Z5 User Manual page 65

Note
If the message "Invalid" appears, the password you entered is incorrect.
If you have difficulties, please contact your Network Operator/Service Provider.
Personal lock
The Phone lock prevents unauthorized use of your phone if it is stolen or
if the SIM card is exchanged. The security code is not set when you buy
the phone. You can change the security code (0000) to any four-to-eight
digit code.
Note
A security code is required for the functions "Call time reset", "Factory reset" and
"Delete all entries".
On
If the phone lock is set to "on", you are requested to enter the all
phone lock code every time you turn on the phone.
Off
The security code is not used.
If other SIM
This setting is necessary when you are using a different SIM card.
Change code
The security code is changed.
PREFERENCES SECURITY
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CALL SETTINGS
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CALL TIME, COST
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