You can change the screen lock method by using one of the following options: None, Slide, PIN, Password.
1 Tap Settings on the Home screen or on the All Apps screen.
2 Swipe down and tap Security.
3 Tap Screen lock.
4 Select a screen lock method. None
Choose this option to deactivate the screen lock.
Choose the slide lock method to unlock the screen.
Enter a personal PIN code consisting of 4-16 digits to unlock the screen.
Enter your personal password consisting of 4-16 characters to unlock the screen.