Keep in mind that ranking is based on quarterly sales, not real market share of phones out there. Regardless, Microsoft assumed 3rd Place in Q1 2013, when the Z10 was launched in Canada Feb. 5th and not in the US until Mar. 26th. The Q10, which has been selling much better than the Z10, didn't launch until May 1st in Canada, and June 5th/6th in the US. So, that market position doesn't really reflect the sales of BB10 phones, and for the most part weren't available yet in Q1 2013. Windows Phone 8 on the other hand was launched Oct. 29th, 2012 and had the benefit of actually being on sale for Q1 2013. Q2 2013 will paint a much better picture of how BB10 is doing, and it won't be until Q3 2013 where there will be a full quarter of where both new BB10 phones have been available for sale.