LG Electronics USA Inc. L53AL 사용자 설명서

Basics

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You can change the way that you lock the screen to prevent others 
accessing your personal information.

Tap 

 > 

 > 

 > Lock screen > Select screen lock.

Select a desired screen lock from None, Swipe, Knock Code, Pattern, PIN 
and Password.

Here are some tips on how to navigate on your phone.

 NOTE 

Ţ 

Do not press too hard; the tap screen is sensitive enough to pick up a light, yet 
firm tap.

Ţ 

Use the tip of your finger to tap the option you want. Be careful not to tap any 
other buttons.