3.Select the Lock key only
4.Select Save.
Lock your phone
1.In Menu mode, select Settings → Security.
2.Select On under Phone lock.
3.Enter a new 4- to
4.Enter the new password again and select Confirm.
•The first time you access a menu that requires a password, you will be prompted to create and confirm a password.
•Samsung is not responsible for any loss of passwords or private information or other damages caused by illegal software.
Unlock the touch screen with smart unlock
By drawing a specified character on the locked touch screen, you can unlock the screen only, unlock and then make a call to a speed dial number, or unlock and then launch an application. To set a smart unlock character,
1.In Menu mode, select Settings → Smart unlock.
2.Select On under Gesture unlock.
3.Select an unlock option.
4.Select a speed dial number to dial or select an application to launch (if necessary).
5.Select a character for the smart unlock feature.
6.Select 
(if necessary).
7.Select Save.
using basic functions
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