You can allow calls only to family members or other key phone numbers, and block all other phone numbers.
Select Contacts and
> SIM numbers > Fixed dialing numbers.
Not all SIM cards support the fixed dialing service. You need your PIN2 code from your service provider.
Select
> Activate fixed dialing. Enter the PIN2 code.
Select
> New SIM contact.
Enter the PIN2 code.
Enter the contact name and phone number to which calls are allowed, and select
.
To add a contact from the contacts list to the fixed dialling list, select
> Add from Contacts and a contact.
To send a text message to a SIM contact while the fixed dialing service is active, you need to add the text message center number to the fixed dialing list.