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The phone lock code prevents others from accessing the contents of your phone (such as pictures and messages). When the phone lock code is turned on, it needs to be used every time you turn on your phone and when it has been in sleep mode.
1. Find "Security"
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
2. Create phone lock code using a pattern
Press Screen lock.
Slide your finger across the screen to connect at least four points and press Next.
Repeat the selected phone lock code and press Confirm.
Press the required setting.
3. Turn off use of phone lock code
Press Screen lock and key in the phone lock code you created earlier.
Press YES, REMOVE.
4. Return to the home screen
Press the Home key to return to the home screen.