Select Menu > Ctrl. panel > Settings and Phone > Call barring.
You can bar the calls that can be made or received with the device (network service). To modify the settings, you need the barring password from your service provider. Call barring affects all call types.
Select from the following voice call barring settings:
Outgoing calls - Prevent making voice calls with your device.
Incoming calls - Prevent incoming calls.
International calls - Prevent calling to foreign countries or regions.
Incoming calls when roaming - Prevent incoming calls when outside your home country.
International calls except to home country - Prevent calls to foreign countries or regions, but allow calls to your home country.
To check the status of voice call barrings, select the barring option and Options > Check status.
To deactivate all voice call barrings, select a barring option and Options > Deactivate all barrings.
To change the password used for barring voice, fax, and data calls, select Options > Edit barring password. Enter the current code, then the new code twice. The barring password must be four digits long. For details, contact your service provider.