Samsung SGH-X640 - Manual (Page 59)

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Menu functions
Security (Menu 9.4)
Use this menu to protect the phone against
unauthorised use by managing the several access
codes of your phone and SIM card.
PIN check (Menu 9.4.1)
The 4-to 8-digit PIN (Personal Identification Number)
protects your SIM card against unauthorised use.
When this feature is enabled, the phone requires your
PIN each time it is switched on.
Change PIN
(Menu 9.4.2)
Use this menu to change your PIN. The PIN Check
feature must be enabled to use this feature.
Phone lock
(Menu 9.4.3)
The Phone lock feature locks the phone from
unauthorised use.
When this feature is enabled, you must enter a 4- to
8-digit phone password each time the phone is
switched on.
The password is preset to 00000000. To change the
password, use the Change password menu.
Change Password
(Menu 9.4.4)
Use this menu to change your phone password. The
password is preset to 00000000.
Privacy
(Menu 9.4.5)
Use this menu to lock your media contents, including
MMS messages, voice memos, images, and sounds.
1. Press <Select> to check the item(s) to be locked.
2. Press <OK> to lock the marked items.
3. Enter the phone password and press <OK>.
To access a locked item, you need to enter the phone
password.
SIM lock
(Menu 9.4.6)
The SIM lock feature allows your phone to work only
with the current SIM by assigning a SIM lock code. You
If you enter an incorrect PIN /PIN 2 three times in
succession, the SIM card is blocked. To unblock it
you need to enter your PUK/PUK2 (Personal
Unblocking Key). The codes are supplied by your
network operator.