Haier Smart Phone User Manual - page 7
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Lock & Unlock Screen
Locking the Screen
To save your battery, prevent accidental touches or when you want
to wipe smudges off your touch screen, put the touch screen to
sleep by pressing the Power Key
Unlocking the Screen
To wake up the touch screen, just press the Power Key again, and
then drag the lock icon to the right on the screen to unlock according
to the clue on the screen.
Lock icon
Unlock icon