To lock a SIM card

1From the Home screen, tap .

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

3Select a SIM card.

4Tap Lock SIM card.

5Enter 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/RUIM card lock.

3Select a SIM card.

4Tap Change SIM PIN.

5Enter the old SIM card PIN and tap OK.

6Enter the new SIM card PIN and tap OK.

7Re-type 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

3Tap Select SIM card, then select a SIM card.

4Tap Fixed dialling numbers > Change PIN2.

5Enter the old SIM card PIN2 and tap OK.

6Enter the new SIM card PIN2 and tap OK.

7Confirm the new PIN2 and tap OK.

To unlock a locked SIM card

1Enter the PUK code and tap OK.

2Enter a new PIN code and tap OK.

3Re-enter the new PIN code and tap OK.

If you enter an incorrect PUK code too many times, the SIM card becomes locked. 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.

To create a screen unlock pattern

1Drag the status bar downwards, then tap .

2Tap Security > Screen lock > Pattern.

3Follow the instructions in your device.

To unlock the screen using a screen unlock pattern

1Activate the screen.

2Draw your screen unlock pattern.

If the unlock pattern you draw on the screen is rejected five times in a row, you must wait 30 seconds and then try again.

To change the screen unlock pattern

1From your Home screen, tap .

2Find and tap Settings > Security > Screen lock.

3Draw your screen unlock pattern.

4Tap Pattern.

5Follow the instructions in your device.

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Sony 1275-9580 manual Setting a screen lock