To remove a SIM card lock
1
From the Homescreen, tap .
2
Find and tap
Settings
>
Security
>
Set up SIM card lock
.
3
Unmark the
Lock SIM card
checkbox.
4
Enter the SIM card PIN and tap
OK
.
To change the SIM card PIN
1
From the Homescreen, tap .
2
Find and tap
Settings
>
Security
>
Set up SIM card lock
.
3
Tap
Change SIM PIN
.
4
Enter the old SIM card PIN and tap
OK
.
5
Enter the new SIM card PIN and tap
OK
.
6
Retype the new SIM card PIN and tap
OK
.
To unlock a blocked SIM card using the PUK code
1
Enter the PUK code and tap
.
2
Enter a new PIN code and tap
.
3
Re-enter the new PIN code and tap
.
If you enter an incorrect PUK code too many times, you need to contact your network operator
to get a new SIM card.
Screen settings
To Adjust the Screen Brightness
1
From your Homescreen, tap .
2
Find and tap
Settings
>
Display
>
Brightness level
.
3
Drag the slider to adjust the brightness.
Lowering the brightness level increases battery performance.
To Set the Screen to Vibrate on Touch
1
From your Homescreen, tap .
2
Find and tap
Settings
>
Sound & notification
>
Other sounds
.
3
Drag the slider beside
Vibrate on touch
to the right. The screen now vibrates
when you tap soft keys and certain applications.
To adjust the idle time before the screen turns off
1
From your Homescreen, tap .
2
Find and tap
Settings
>
Display
>
Sleep
.
3
Select an option.
To turn off the screen quickly, briefly press the power key .
Smart backlight control
The smart backlight control keeps the screen on as long as the device is held in your
hand. Once you put down the device, the screen turns off according to your sleep
setting.
To turn on the Smart backlight control function
1
From your Home screen, tap .
2
Find and tap
Settings
>
Display
>
Smart backlight control
.
3
Drag the slider beside
Smart backlight control
to the right.
Screen Pinning
Use screen pinning to set your device to display only the screen for a specific
application. For example, if you are playing a game and you accidentally touch the Home
navigation key, the screen pinning feature prevents the active game app screen from
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