Apple iPhone 4 (iOS4)

Apple iPhone 4

iOS5 iOS4
If you don’t know your device’s software version, you can check it by selecting Settings > General > About.

How to guides

Change PIN

The PIN protects your SIM from unauthorised use. If use of PIN is turned on, it needs to be keyed in when you turn on your phone. Follow these instructions to change your PIN.
You need to turn on use of PIN before you can change your PIN. Click here for more information.

Step 1 of 9

Find "Change PIN"

Press Settings.

Step 2 of 9

Find "Change PIN"

Press Phone.

Step 3 of 9

Find "Change PIN"

Press SIM PIN.

Step 4 of 9

Find "Change PIN"

Press Change PIN.

Step 5 of 9

Change PIN

Press Current PIN and key in your current PIN.

If you enter an incorrect PIN three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting customer services.

Please note:
If the wrong PUK is entered ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from your operator.
Step 6 of 9

Change PIN

Press New PIN and key in a new 4-digit PIN.

If you enter an incorrect PIN three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting customer services.

Please note:
If the wrong PUK is entered ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from your operator.
Step 7 of 9

Change PIN

Press Confirm New PIN and key in the new PIN again.

If you enter an incorrect PIN three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting customer services.

Please note:
If the wrong PUK is entered ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from your operator.
Step 8 of 9

Change PIN

Press Save.

If you enter an incorrect PIN three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting customer services.

Please note:
If the wrong PUK is entered ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from your operator.
Step 9 of 9

Exit

Press the Home key to return to standby mode.

1. Find "Change PIN"

Press Settings.
Press Phone.
Press SIM PIN.
Press Change PIN.

2. Change PIN

Press Current PIN and key in your current PIN.
If you enter an incorrect PIN three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting customer services.

Please note:
If the wrong PUK is entered ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from your operator.
Press New PIN and key in a new 4-digit PIN.
If you enter an incorrect PIN three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting customer services.

Please note:
If the wrong PUK is entered ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from your operator.
Press Confirm New PIN and key in the new PIN again.
If you enter an incorrect PIN three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting customer services.

Please note:
If the wrong PUK is entered ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from your operator.
Press Save.
If you enter an incorrect PIN three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting customer services.

Please note:
If the wrong PUK is entered ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from your operator.

3. Exit

Press the Home key to return to standby mode.

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