LG -P760 Guide De L'utilisateur page 539

Your Phone
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 its LCD and touch
screen functionalities. Do not cover the LCD's proximity sensor with a protective film.
This can cause the sensor to malfunction.
TIPS
- Tap the Menu Key
available.
- If your phone has errors when you use it or you cannot turn it on, remove the
battery, install it again and turn it on after 5 seconds.
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whenever you open an application to check what options are