Samsung Galaxy J3 Luna Pro User Manual page 37

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Proximity sensor
-
Turns off the screen and disables touch functionality when the
device is in close proximity to the human body.
-
Turns the screen back on and enables touch functionality when
the device is outside a specific range to the human body.
Power key
-
Briefly press to turn on or off the screen.
-
Press and hold to select a power control option.
Home key
-
Press and hold to launch Google.
-
Gently put your finger on the key when you want to unlock the
screen with your fingerprint.
-
Press twice to launch the camera.
Volume keys
-
Adjust the volume for ringtones, calls or notifications.
-
Gently press a volume key to take a photo.
Learn About Your Device
29

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