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(Personal Unblocking Key) and a new PIN. Your PIN and PUK are supplied by your
network operator.
To set up a SIM card lock
1
From the Home screen, tap
2
Find and tap Settings > Security > Set up SIM card lock.
3
Mark the Lock SIM card checkbox.
4
Enter the SIM card PIN and tap OK. The SIM card lock is now active and you
will be prompted to enter this lock every time you restart the device.
To remove a SIM card lock
1
From the Home screen, 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 Home screen, 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
Re-type 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 Home screen, 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 Home screen, 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 Home screen, 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.
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