Samsung SGH-T769 User Manual page 234

PIN Lock and Unlock
Press
1.
Location and security.
Tap Set up screen lock.
2.
Tap PIN.
3.
4. Enter a PIN number using the numeric keypad and touch
Continue to confirm the password.
Confirm the PIN by re-entering it and tap OK to confirm.
5.
Your phone now requires you to enter this PIN number in
order to unlock the phone.
Password Lock and Unlock
Press
1.
Location and security.
Tap Set up screen lock.
2.
Tap Password.
3.
Enter a password using the keypad and tap Continue to
4.
confirm the password.
Confirm the password by re-entering it and tap OK to
5.
confirm.
230
and then tap (Settings)
and then tap (Settings)
Disable USB debugging mode
When enabled, USB debugging is disabled while the screen is
locked.
Press
1.
Location and security.
Tap Disable USB debugging mode.
2.
Setting up SIM Card Lock
Prevent another user from using your SIM card to make
unauthorized calls or from accessing information stored on your
SIM card by protecting the information using a PIN code.
Press
1.
Location and security.
Tap Set up SIM card lock.
2.
Tap Lock SIM card, enter your SIM PIN code, then tap OK.
3.
Note: You must activate Lock SIM card before you can change your SIM PIN
code.
and then tap (Settings)
and then tap (Settings)