You can edit the security settings depending on a setting. You can set them to be either on or off, and check the status of the setting.
You can add phone numbers to a list to be blocked and create a closed user group.
- Select Menu > > Security settings > Change access codes.
- Select the code you want to change, for example, Change security code or Change PIN code.
You need to have the current codes in hand to be able to change them.