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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 Home screen, tap
.
2
Find and tap Settings > Security > Set up SIM card lock.
3
Drag the slider beside Lock SIM card to the On position.
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
Drag the slider beside Lock SIM card to the Off position.
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.
Finding the identification number of your device
Your device has a unique ID (identification) number. In your device, this number is
referred to as the IMEI (International Mobile Equipment Identity). You should keep a
copy of this number. You may require it, for example, when you access the Xperia™
Care support service and need to register your device. Also, if your device is stolen,
some network providers can use this number to stop the device from accessing the
network in your country.
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