Tap Apps.

Tap Settings.

Tap Security.

Tap Screen lock.

Choose one of the following options:
Create phone lock code using swipe, go to 2a.
Create phone lock code using face recognition, go to 2b.
Create phone lock code using a pattern, go to 2c.
Create phone lock code using a PIN, go to 2d.
Create phone lock code using a password, go to 2e.
Turn off use of phone lock code, go to 2f.

Tap Swipe.

Tap Face unlock.

Tap Set it up.

Tap Continue.
Hold your mobile phone in front of your face and centre your face in the circle displayed.
Wait while your mobile phone registers your face.

Tap Continue.

Tap Pattern or PIN.

If you select Pattern:

Tap and drag a point to connect at least four points.

Tap Continue.
Repeat the selected phone lock code to confirm.

Tap Confirm.

Tap OK.

If you select PIN:

Key in the required phone lock code and tap Continue.

Key in the phone lock code again and tap OK.

Tap Pattern.

Tap and drag a point to connect at least four points.

Tap Continue.
Repeat the selected phone lock code to confirm.

Tap Confirm.

Tap PIN.

Key in the required phone lock code and tap Continue.

Key in the phone lock code again and tap OK.

Tap Password.

Key in the required phone lock code and tap Continue.

Key in the phone lock code again and tap OK.

Tap None.

Tap the Home key to return to standby mode.