Story has a happy ending because she was able to successfully retrieve her cell phone. Hooray! http://geekologie.com/2013/04/dammit-darwin-woman-almost-hit-by-train.php
In the comments people claim that it was actually a suicide attempt. And there's a link to a vid with apparently the same woman saying... something. Turns out I don't speak Portuguese so I'll just have to take the comment's word for it.