Sony ST21i2, ST21a2 Setting a screen lock, To unblock a locked SIM card, To set a screen lock

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

	To set a screen lock
1	From your Home screen, tap > Settings > Security > Screen lock.
2	Select 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.

To create a screen unlock pattern

1 From the Home screen, tap .

2Find and tap Settings > Security > Screen lock > Pattern.

3Follow the instructions in your phone. You are asked to select a security question that will be used to unlock the phone if you forget your screen unlock pattern.

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 can select to either wait 30 seconds and then try again, or to answer the security question you have selected.

To change the screen unlock pattern

1	From your Home screen, tap .
2	Find and tap Settings > Security > Screen lock.
3	Draw your screen unlock pattern.
4	Tap Pattern.
5	Follow the instructions in your phone.
	To disable the screen unlock pattern
1	From your Home screen, tap		> Settings > Security > Screen lock.
2	Draw the screen unlock pattern.
3	Tap Slide.
	To create a screen unlock PIN
1	From your Home screen, tap		> Settings > Security > Screen lock > PIN.
2	Enter a numeric PIN.
3	If necessary, tap	to minimize the keyboard.

4Tap Continue.

5Re-enter and confirm your PIN.

6 If necessary, tap to minimize the keyboard.

7Tap OK.

To disable the screen unlock PIN

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

2Enter your PIN, then tap Next.

3Tap Slide.

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