Getting to know your phone
Secure your lock screen
You can lock your screen so that only you can unlock it to access your phone.
To set an Unlock Pattern, PIN or Password for the first time:
•Touch 
> Apps tab > Settings > Lock screen > Select screen lock > None, Swipe, Face Unlock, Pattern, PIN or Password
NOTE:
Precautions to take when using pattern lock.
It is very important to remember the unlock pattern you set. You will not be able to access your phone if you use an incorrect pattern 5 times. You have 5 opportunities to enter your unlock pattern, PIN or password. If you have used all 5 opportunities, you can try again after 30 seconds.
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