Microsoft’s Windows Phone revenue: $613 million, at the very most

Buried deep within Microsoft’s annual report Thursday to the U.S. Securities and Exchange Commission is this little gem: In the company’s 2011 fiscal year, revenue for the Xbox 360 platform was $8.103 billion. That’s not what’s noteworthy. What’s noteworthy is if you subtract that number from overall revenue to the Entertainment and Devices Division –.

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