LG E975 Optimus G User Guide

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Phone overview
Earpiece
Front-Facing Camera lens
Proximity / Luminance Sensor
Home key 
Return to the Home screen from any screen.
Back key 
Return to the previous screen. Exit an app after using it.
Power/Lock key
Switch your phone on/off by pressing and holding this key
Short press to lock/unlock the screen
Menu key 
Check what options are available.
Touch screen
Notification LED
NOTE: Proximity sensor 
When receiving and making calls, the proximity sensor automatically turns 
the backlight off and locks the touch screen by sensing when the phone is 
near your ear. This extends battery life and prevents you from unintentionally 
activating the touch screen during calls.
 WARNING
Placing a heavy object on the phone or sitting on it can damage the LCD and 
touch screen functions. Do not cover the LCD proximity sensor with protective 
film. This could cause the sensor to malfunction.
Getting to know your phone