Find it: Press M > w Settings > Personalize
> Screen Saver
option
Picture Select an image for your screen
saver, or None for no screen saver.
Delay
Select the length of inactivity
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To save battery life, your backlight turns off
when you're not using your phone. The
backlight turns back on when you open the flip
or press any key. To set how long your phone
waits before the backlight turns off:
Press M > w Settings > Initial Setup > Backlight.
Note: To turn the backlight on or off for Java™
applications, press M > w Settings