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    Smart backlight control

    The smart backlight control keeps the screen on as long as the device is held in your hand. Once you put down the device, the screen turns off according to your sleep setting.

    To enable or disable the Smart backlight control function

    1. Find and tap Settings > Display > Advanced > Smart backlight control.
    2. Tap the slider to enable or disable the function.
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    On your Xperia™ device, go to Settings > About Phone/Tablet > Model number