Change type of screen lock
To change the type of security required to unlock your phone after it goes to sleep:
Go to Settings > Security & screen lock.
Touch Screen lock and select the type of lock you want:
- None: Turns off screen locks.
Slide: Prevents accidental dialling but doesn't secure the phone. Touch
and drag to 
. Do not select this if you want to use a trusted Bluetooth device.- Pattern: Draw a pattern on a grid. If you enter the wrong pattern five times, you can enter your Google account email and password to unlock the phone.
- PIN: Enter a four to sixteen digit numeric code.
- Password: Enter 4–16 letters, digits or symbols for the password.