Find "Voicemail server"
Press the Navigation key.
Scroll to Messaging and press the Navigation key.
Scroll to Settings and press the Navigation key.
Scroll to Messages and press the Navigation key.
Scroll to SMS settings and press the Navigation key.
Scroll to Voicemail server and press the Navigation key.
Save voicemail number
Highlight the required voicemail and press Options.
Scroll to Edit and press the Navigation key.
Highlight the bottom field and key in (prefix) 5 (your phone number)
Press the Navigation key twice.
Exit
Press Disconnect to return to standby mode.