Dell Mini 3v - Manual (Page 33)

3 To add new numbers, press the Options button, then tap Add.
4 Type the name and number of the contact.
5 Press the Options button, and then tap Save.
6 Enter your SIM PIN2 code. Press the Options button and then tap OK.
7 Continue adding numbers until you have all the contacts you want to include on the FDN list.
You may also edit or delete contacts at any time.
To disable the FDN feature, tap the FDN Enabled option. This changes the FDN status to FDN Disabled.
Voice Call Barring
The Video call barring screen allows you to enable or disable outgoing or incoming calls from a specific number or contact by using a preset password.
To enable or disable the call barring functions, tap the option on the screen that you want to set up.
To exit the Voice call barring screen, tap the Back icon.
Voice Call Forwarding
The Voice call forwarding option allows you to forward calls directly to your voicemail.