This feature is currently not working for SMS text messages and voice messages. Email is still working. Bb is working on a fix for the issue. At this time we do not know of a resolution date. 8/12/2015
The notification system alerts you when events occur in your courses, such as when items are due, grades are available, new content and tests are made available, and when you have unread discussions and blogs. Notifications are generated automatically whenever their associated events occur.
The following video will show you how to setup notifications within Bb.