Protect Your SIM Card With the SIM Lock Password
You can protect your SIM card against unauthorized use with a personal identification number (PIN). After a PIN is enabled to lock your SIM, you will need to enter the PIN each time you turn on the device in order to unlock your SIM.
NOTE: The SIM card will be permanently locked if you enter the incorrect PIN for three consecutive times. You must then enter the Personal Unblocking Key (PUK) to unlock the SIM card. Contact your service provider to obtain the PUK.
To enable the SIM card PIN
1Touch the Home button 
→ Menu button 
→ Settings→ Location & security→ Set up SIM card lock→ Lock SIM Card, or
touch the Launcher button → Settings icon →
Location & security→ Set up SIM card lock→ Lock SIM Card.
2Type your SIM card PIN, and then touch OK.
To change the SIM card PIN
1Touch the Home button 
→ Menu button 
→ Settings→ Location & security→ Set up SIM card lock→ Change SIM PIN, or
touch the Launcher button → Settings icon →
Location & security→ Set up SIM card lock→ Change SIM PIN.
2Type the old SIM card PIN, and then touch OK.
3Type the new SIM card PIN, and then touch OK.
4Type the new SIM card PIN again, and then touch OK.
