You can personalize your voicemail by calling *98.
Once dialed, you get the menu below to adjust things:

Press 1. Read voicemail messages.
Press 2. Change folders
    Press 0. New messages folder
    Press 1. Old messages folder
    Press 2. Work messages folder
    Press 3. Family messages folder
    Press 4. friend messages folder
    Press #. Cancel
Press 3. Advanced options
    Press 1. Send reply
    Press 3. Hear the message envelope
    Press 5. Leave a message
    Press . Return to the main menu
Press 4. Play previous message
Press 5. Repeat current message
Press 6. Play next message
Press 7. Delete current message
Press 8. Forward message to another mailbox
Press 9. Save message in a folder
Press 0. Mailbox options
    Press 1. Record your unavailable message
    Press 2. Record your busy message
    Press 3. Record your name
    Press 4. Change your temporarily message
    Press 5. Change your password
    Press . Return to the main menu
Press *. Help
Press #. Exit