Samsung Galaxy S 4G User Manual page 192

Using Visible a Pattern
When enabled, this feature displays the text entered into the
password field.
Using Tactile Feedback
When enabled, the User tactile feedback option, you will feel
vibration as feedback while drawing the pattern.
PIN Lock and Unlock
1. Press
Location and security.
Tap Set screen lock.
2.
Tap PIN.
3.
Enter a PIN number using the numeric keypad and touch
4.
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.
187
and then tap (Settings)
and then tap (Settings)
Tap Set 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.
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 touch OK.
3.
Note: You must activate Lock SIM card before you can change your SIM PIN
code.
and then tap (Settings)