Samsung SGH-X496ZSAGEN - Manual (Page 174)

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2. Enter a PIN2 of your choice and press the OK (left) soft
key ( ) or the key.
The “Confirm New PIN2” message appears in the
display, prompting you to enter the new PIN2 a second
time.
3. Enter the new PIN2 again using the keypad, then press
the OK (left) soft key ( ) or the key.