1Place the cover over the back of the phone so that the camera lens hole in the cover fits over the camera lens.
2Press down firmly on all edges of the battery cover to make sure it gets attached tightly.
Turning the device on and off
To turn on the device
1Press and hold down the power key 
until the device vibrates.
2If your screen goes dark, briefly press the power key 
to activate the screen.
3Enter your SIM card PIN when requested, then tap 
.
4If your screen is locked, place a finger on the screen and swipe up or down to unlock it.
5Wait a while for the device to start.
Your SIM card PIN is initially supplied by your network operator, but you can change it later from the Settings menu. To correct a mistake made while entering your SIM card PIN, tap 
.
To turn off the device
1Press and hold down the power key 
until the options menu opens.
2In the options menu, tap Power off.
3Tap OK.
It may take a while for the device to shut down.
Locking and unlocking the screen
When your device is on and left idle for a set period of time, the screen darkens to save battery power, and locks automatically. This lock prevents unwanted actions on the touch screen when you are not using it.
To activate the screen
•Briefly press the power key 
.
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