# Change or remove the PIN codes of Modem Interfaces

In some cases, you might need to change or remove your PIN code.

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If you change the SIM card of a mobile broadband modem that is connected to a Single Firewall and the PIN code is enabled on the new SIM card, you must change the PIN code information about the related Modem Interface. You must remove the PIN code if a PIN code was enabled on the old SIM card but a PIN code is not enabled on the new SIM card.

You must also change the PIN code if you have received the message “PIN code differs from initial contact settings” at policy installation after you have finished configuring the Firewall. This message means that the PIN code in the Modem Interface properties does not match the PIN code that you have entered for the mobile broadband modem in the command-line interface. If there are other problems with the PIN code, you can check through the engine’s command line interface which PIN code was used in the initial configuration. You can then change the PIN code information if necessary.

For more details about the product and how to configure features, click Help or press F1.

## Steps

1. On the NGFW Engine command line, enter the sg-reconfigure command to start the NGFW Configuration Wizard, then change the mobile broadband modem’s PIN code information.
2. In the Management Client, right-click the NGFW Engine, then select Edit <element type>.
3. Browse to Interfaces.
4. Right-click the Modem Interface, then select Properties.
5. Change the PIN code information, then click OK.
6. Click Save and Refresh.