Call your voice mailbox
You can divert your incoming calls to your voice mailbox (network service). People can leave you a message, for example, when you have not answered the call.
In the home screen, press and hold 1.
Change the phone number of your voice mailbox
Select Menu > Settings and Calling > Call mailbox .
Select and hold a mailbox, and from the pop-up menu, select Change number.
Enter the number (obtained from your network service provider), and select OK.