Find "Voicemail server"
Press the Navigation key.
Scroll to Messaging and press the Navigation key.
Scroll to Message settings and press the Navigation key.
Scroll to Voicemail server and press the Navigation key.
Save voicemail number
Highlight the top voicemail server and press Options.
Scroll to Edit and press the Navigation key.
Scroll to Number and key in (prefix) 5 (your phone number)
Press the Navigation key.
Exit
Press Disconnect to return to standby mode.