This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.
getNumber method is used to get the voicemail box dialing number of a specified service.
var number = navigator.mozVoicemail.getNumber([service]);
- A number representing the voicemail service to access.
A string or
null if no number was found.
Not part of any specification yet.