Microsoft unveils Windows Phone 8

Microsoft CEO Steve Ballmer unveils the new Windows Phone 8 at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif. The Windows Phone 8 marks the Seattle-based company's latest update from its two-year-old Windows Phone 7 platform as the company looks to compete in the increasingly dense smartphone segment dominated by rivals Apple and Google.

Microsoft CEO Steve Ballmer unveils the new Windows Phone 8 at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Actress Jessica Alba speaks on stage during the Microsoft Windows Phone 8 event at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft CEO Steve Ballmer holds a Nokia Lumia 920 smartphone during a Windows Phone 8 launch event at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft CEO holds a Samsung ALTV S smartphone during Windows Phone 8 event at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft CEO Steve Ballmer holds a Windows Phone 8X by HTC smartphone during a Windows Phone 8 launch event at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Actress Jessica Alba speaks on stage during the Microsoft Windows Phone 8 event at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft CEO Steve Ballmer unveils the new Windows Phone 8 at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft Corporate Vice President Joe Belfiore (L) listens as actress Jessica Alba speaks during a Windows Phone 8 product launch at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft Corporate Vice President Joe Belfiore, right, along with his children (L-R) Alexander, Sydney, and Piper introduce Windows Phone 8's Kid's Corner feature during a product launch at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft Corporate Vice President Joe Belfiore unveils Windows Phone 8's Data Sense feature during a product launch at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft CEO Steve Ballmer holds a Nokia Lumia 920 smartphone during a Windows Phone 8 launch event at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft Corporate Vice President Joe Belfiore (R) along with his children (L-R) Alexander, Sydney, and Piper introduce Windows Phone 8's Kid's Corner feature during a product launch at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft Corporate Vice President Joe Belfiore unveils Windows Phone 8's Pandora integration feature during a product launch at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft unveils the new Windows Phone 8 at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft Corporate Vice President Joe Belfiore speaks on stage during a Windows Phone 8 product launch at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

(L to R) Microsoft Corporate Vice President Joe Delfiore, CEO Steve Ballmer and actress Jessica Alba hold a smartphone featuring Windows Phone 8 during a product launch at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.

Microsoft CEO Steve Ballmer holds a Nokia Lumia 920 smartphone during a Windows Phone 8 launch event at Bill Graham Civic Auditorium on Oct. 29, 2012, in San Francisco, Calif.