Windows is at long last ready to roll out its first Windows Phone 7 device. The company has just sent out formal invitations to the big reveal—an Oct. 11 press conference, CNET reports. Steve Ballmer will be in attendance, accompanied by AT&T Mobility CEO Ralph de la Vega. AT&T will be the preferred partner for the phone, putting Microsoft in direct competition with the iPhone. Executives from T-Mobile will also be there, however, showing off other phones with the OS. Sources tell CNET an early November US launch is expected.
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