Windows Phone OS Free to OEMs
From the report
Desperate times call for desperate measures. With Windows Phone failing to make a significant dent in the market share of Google's Android and Apple's iOS in the last four years, Microsoft is waiving the licence fee and offering it to at least two Indian phone makers for free.
Speculation: They did not mention any patent license deal for Android handsets they make. But likely it must be part of the deal. Pay patent license fees for Windows Phone and Android handsets and get the OS License for free.
Could be a win-win situation for OEMs as well as Microsoft that seeks to penetrate the market.