Locking and unlocking the screen
Press the power button to lock 
the screen. If your phone is idle for 
a specified period of time, the 
screen will automatically lock 
itself.
If the screen is off, press the 
power button to turn it on. Slide 
your finger in any direction to 
unlock the screen.
Flick up from the bottom of the 
lock screen to access the quick 
operation panel for one-touch 
optimization or to open 
commonly used applications, such 
as Calculator.