To view your IMEI number

SIM card protection

The SIM card lock only protects your subscription. Your device will still work with a new SIM card. If the SIM card lock is on, you have to enter a PIN (Personal Identity Number). If you enter your PIN incorrectly more times than the maximum number of attempts allowed, your SIM card will become blocked. You need to enter your PUK (Personal Unblocking Key) and then a new PIN. Your PIN, PIN2 and PUK are supplied by your network operator.

To enable the SIM card PIN lock

1From the Home screen, tap .

2Find and tap Settings > Security > Set up SIM card lock > Lock SIM card.

3Enter the SIM card PIN and tap OK.

To change the SIM card PIN

1From the Home screen, tap .

2Find and tap Settings > Security > Set up SIM card lock > Change SIM PIN.

3Enter the old SIM card PIN and tap OK.

4Enter the new SIM card PIN and tap OK.

5Retype the new SIM card PIN and tap OK.

To change the SIM card PIN2

1From the Home screen, tap .

2Find and tap Settings > Call settings > Fixed dialing numbers > Change PIN2.

3Enter the old SIM card PIN2 and tap OK.

4Enter the new SIM card PIN2 and tap OK.

5Confirm the new PIN2 and tap OK.

To unblock a locked SIM card

1When Enter PUK and new PIN code appears, enter the PUK code.

2Enter a new PIN code and tap OK.

If you enter an incorrect PUK code too many times, the SIM card becomes blocked. If this happens, contact your service provider to get a new SIM card.

Setting a screen lock

There are several ways to lock your device screen. For example, you can use the Face Unlock feature, which uses a picture of your face to unlock the screen. You can also set a screen unlock pattern, a number-based PIN lock, or a text-based password.

To set a screen lock

1From your Home screen, tap > Settings > Security > Screen lock.

2Select an option.

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. Refer to Sony Customer support for more information.

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Sony SGP312U1/W manual SIM card protection, Setting a screen lock