Microsoft Debuts Windows 8 Phone Software to Rival Google

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Microsoft Corp., the world’s largest software maker, will release a new version of the Windows Phone program in handsets this fall, part of a broad effort to gain ground against Apple Inc. and Google Inc. in mobile devices.

Windows Phone 8 has the same core software as the new Windows 8 operating system for personal computers and tablets, meaning it can be used in a variety of phone models at different prices, the company said at an event in San Francisco today.