Microsoft pushing lower priced version of Windows Phone 8.1 to manufacturers46
A new version of Microsoft's mobile OS, called Windows Phone 8.1 with Bing, offers the latter as the default search engine within Internet Explorer. Users will still be able to change search engines as they wish. Some of these models, especially tablets, will also include Office, or a one year subscription to Office 365.
The main reason for giving manufacturers a lower cost, or even possibly free version of the platform, is to encourage them to continue offering lower cost Windows Phone models. And now, some of them will come with Office. It seems like a win-win-win for consumers, manufacturers and for Microsoft. Throw in app developers taking advantage of the increase in users, and it's a win-win-win-win.
source: Microsoft via TheRegister