LG L22C User Manual page 17

Getting to know your phone
If there are any programs running when you lock your screen, they may be still
running in Lock mode. It is recommended that you exit all programs before entering
Lock mode to avoid unnecessary charges (e.g. phone calls, web access and data
communications).
To wake up your phone, press the Power/Lock Key or double-tap the center of the
screen. The Lock screen will appear. Touch and slide the Lock screen in any direction
to unlock the screen. The last screen you viewed will open.
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