Address Book PIN
Set a PIN to protect the address book. You are prompted to enter the correct PIN to register, edit, or delete destinations.
How to access the option:
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] (Menu) -> <System Settings> -> <Restrict TX Function> -> <Address Book PIN>
How to set a PIN:
Enter up to a 7-digit number, and then enter the same number when the confirmation screen appears.
To cancel the entered PIN, clear the numbers and press [OK].