1. Find "Setup"
Press the phone icon.
Press the menu icon.
Press Settings.
Press Voicemail.
Press the required SIM.
Press Advanced Settings.
Press Setup.
2. Save voicemail number
Press the field below "Voicemail number".
Key in (prefix) 5 (your phone number) and press OK.
(prefix) 5 (your phone number)
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.