Read help info
You can save your voicemail number making it easy to call and listen to your voice messages.
Find "Voicemail number"
Slide two fingers down the display starting from the top edge of your phone.
Press Voicemail settings.
Press Voicemail number.
Save voicemail number
Key in +447836121121 and press OK.
Return to the home screen
Press the home icon to return to the home screen.