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You can save your voicemail number making it easy to call and listen to your voice messages.
Find "Voicemail server"
Press Text message.
Press Voicemail server.
Save the voicemail number
Press the field below "Voicemail server".
Press the field below "Voicemail number" and key in +447836121121
Return to the home screen
Press the Home key to return to the home screen.