Getting started 
8
Powering on or off your phone
• 
To power on your phone, press and hold the power button. 
• 
To power off your phone, press and hold the power button to display an 
option menu, and then touch 
Power off
 > 
OK
.
 
If you are experiencing slowdown issues or the system isn't responding 
properly, press and hold the power button for 10 seconds or more to 
restart your phone. 
Locking and unlocking the screen
Locking the screen not only prevents mistaken operations from occurring 
without your knowledge, but also protects your phone from unauthorized 
use. You can lock and unlock your screen in different ways. The pre-installed 
screen unlock method is used as an example in this section. 
Locking the screen
• 
Method 1: Press the power button to manually lock the screen. 
• 
Method 2: After being idle for a specified period of time, your phone 
automatically locks its screen.
 
To set the screen lock method, touch  on the home screen. On the 
displayed 
General
 tab, touch 
Screen lock
.