Sony Xperia Z Ultra - 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.

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 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.

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