Doro Liberto 820 Mini
Android 4.4.2
1. Find" Voicemail"
Press Phone.
Press the Menu key.
Press Call settings.
Press Voicemail.
2. Save voicemail number
Press the field below "Number".
Key in 707 and press the confirm icon.
707
3. Return to the home screen
Press the Home key to return to the home screen.