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The PIN2 is used to limit the use of your SIM. The PIN2 enables you to decide which phone numbers can be called or how much your SIM can be used. Follow these instructions to change your PIN2.
Find "Fixed dialling numbers"
Press the menu icon.
Press Call settings.
Press Fixed dialling numbers.
Press Change PIN2.
Key in the current PIN2 (default is 1111) and press OK.
Key in your new PIN2 and press OK.
Key in the new PIN2 again and press OK.
Press the Home key to return to standby mode.