Sim Card Protection; Screen Settings - Sony SGP351 User Manual

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To Enable Touch Tones
1
From your Homescreen, tap
2
Find and tap Settings > Sound & notification > Other sounds.
3
Drag the slider beside Touch sounds to the right.

SIM card protection

You can lock and unlock each SIM card that you use in your device with a PIN (Personal
Identity Number). When a SIM card is locked, the subscription linked to the card is
protected against misuse, meaning that you have to enter a PIN every time you start your
device.
If you enter the PIN incorrectly more times than the maximum number of attempts
allowed, your SIM card will become blocked. You then need to enter your PUK (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 Homescreen, 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 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.
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