Locking and unlocking the screen
If you do not use the phone for a while, the screen is turned off and locked automatically. This helps to prevent accidental touches and saves battery power.
When you are not using the
the Power/Lock key 
to lock your phone.
If there are any programs running when you set lock screen, they may be still running in Lock mode. It is recommended that you exit all programs before entering Lock mode to avoid unnecessary charges (e.g. phone calls, web access and data communications).
To wake up your phone, press the Power/
Lock key 
. The lock screen will appear. Touch and slide the lock screen in any direction to unlock your home screen. The last screen you viewed will open.
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