Screen Settings; Screen Lock - Sony SGP321 User Manual

To lock or unlock a SIM card
1
From the Homescreen, tap
2 Find and tap Settings > Security > Set up SIM card lock.
3 Mark or 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 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 Home screen, tap
2 Find and tap Settings > Display > Brightness.
3 Unmark the Adapt to lighting conditions checkbox if it is marked.
4
Drag the slider to adjust the brightness.
Lowering the brightness level increases battery performance.
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

Screen lock

There are several ways to lock the screen. The security level of each lock type is listed
below in order of weakest to strongest:
• Swipe – no protection, but you have quick access to the Homescreen
• Face Unlock – unlocks your device when you look at it
• Unlock pattern – draw a simple pattern with your finger to unlock your device
• Unlock PIN – enter a numeric PIN of at least four digits to unlock your device
• Unlock password – enter an alpha-numeric password to unlock your device
It is very important that you remember your screen unlock pattern, PIN, or password. If you
forget this information, it may not be possible to restore important data such as contacts and
messages.
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