LG G Pad 10.1 V700 Mode D'emploi page 355

To activate Knock Code feature
1
From the Home screen, tap Apps
screen > Select screen lock > Knock Code.
2 This opens a screen that will guide you through how to set your Knock
Code. You have to create a backup PIN as a safety measure in case you
forget your Knock Code.
> Settings > Display > Lock
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