Zte z828 - Changing Screen Brightness; Protecting Your Phone With Screen Locks

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3. Touch WALLPAPERS to pick an image as the wallpaper.
Changing Screen Brightness
1. Touch the Home key > > Settings > Display >
Brightness level.
2. Drag the slider to manually adjust the screen brightness.
NOTE:
With the proximity and light sensor, your phone can automatically
adjust the screen brightness for available light. Touch Adaptive
brightness in the Display settings screen to turn the feature on
or off.
Protecting Your Phone With Screen
Locks
You can protect your phone by creating a screen lock. When it is
enabled, you need to swipe the screen, look at the front camera,
draw a pattern or enter a numeric PIN or a password to unlock
the phone’s screen and keys.
1. Touch the Home key > > Settings > Security > Screen
lock.
2. Touch None, Long press, Pattern, PIN or Password.
 Touch None to disable the screen lock.
 Touch Long press to enable screen lock and allow
unlocking with a ‘touch and hold’ gesture.