Samsung Blackjack Access - Manual (Page 70)

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Band selection (Menu 9.5.8)
For the phone to make and receive phone calls, it
must register with an available network. Your phone
can handle any of the following types of networks:
GSM 1900 and Combined GSM 900/1800.
The country where you purchased your phone
determines the default band that it uses. When you
travel abroad, you may need to change to an
appropriate band.
Security (Menu 9.6)
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 9.6.1)
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 code (Menu 9.6.2)
Use this menu to change your PIN. The PIN check
feature must be enabled to change the PIN.
Phone lock (Menu 9.6.3)
Use this menu to lock 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 9.6.4)
Use this menu to change your phone password.
If you enter an incorrect PIN/PIN2 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
service provider.