Microsoft may have moved just 674,000 Windows Phone 7 devices in its first few months on sale, well-known Russian phone leaker Eldar Murtazin said in a new estimate. While the company said it had shipped 1.5 million to partners, its figures for late 2010 would have netted less than half that amount. The situation is believed to have been exacerbated in early 2011 and in April, Murtazin said.