Re: Not going to happen - look what happened to HTC last time.
Try less than 5%. Blackberry is more fantastically successful in the UK than Windows Phone is, and this is a region where iOS still leads things. As for "fastest growing", by what metric? I'm looking at those charts of actual usage (not phones stuffed into warehouses and shops), and Windows Phone is looking pretty flat to me.
Nobody wants it, even though it's being advertised absolutely everywhere and talked about by all the tech sites and consumer magazines. If Microsoft are lucky, and they waste a few more billion, they might make 4th or 5th over the next 5 or 6 years or so, at current growth rates. That's assuming Google hasn't bought them by then.