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The PIN2 is used to limit the use of your SIM. The PIN2 makes it possible for you to decide which phone numbers can be called or how much the SIM can be used. Follow these instructions to change the PIN2.
Find "Fixed Dialling Numbers"
Press the menu icon.
Press Fixed Dialling Numbers.
Press Change PIN2.
Press the field below Old PIN2 and key in the current PIN2.
Press the field below New PIN2 and key in the new PIN2.
Press the field below Confirm new PIN2 and key in the new PIN2 again.
Press the Home key to return to standby mode.