Sony Xperia Z3 - SIM card protection

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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.

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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.