Microsoft takes another shot at the smartphone market with Windows Phone 8

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Windows Phone chief Joe Belfiore, Microsoft CEO Steve Ballmer, and model-actress Jessica Alba.

Credit: IDGNS San Francisco

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Windows Phone 8, Microsoft's new operating system for cellphones, was launched on Monday and with it the software company's hopes of reclaiming a portion of the fast-growing smartphone market.

Microsoft has been largely absent from the smartphone market during its most-recent years of explosive growth, but market watchers predict the company will soon start to gain share after Monday's launch.

At an event in San Francisco, Joe Belfiore, corporate vice president of Microsoft and head of its phone division, presented new features of the operating system, and CEO Steve Ballmer presented new handsets.

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"There's one more thing that sets Windows Phones apart," said Ballmer. "That is new, killer hardware."

The flagship of the Windows Phone lineup is the Nokia 920, built out of a partnership between the two companies. It will be available through AT&T in the U.S. in November.

Two other high-end smartphones, the Samsung Ativ S and HTC Windows Phone 8X, were previewed by Ballmer.

All three phones will be available in Europe from this weekend and in the U.S. will go on sale through Verizon, AT&T and T-Mobile. Pricing and availability details are expected to be announced by carriers on Monday or soon after.

"The global launch of Windows Phone 8 is just starting," said Ballmer.

The software presents a very different home screen from the rows of icons found on Apple or Android phones and is a key design feature of the operating system.

Its design uses active tiles like those found on Windows 8, Microsoft's new PC operating system that launched Friday. The tiles are constantly changing with fresh information so, for example, a weather tile will update with the latest forecast while the email app will show the latest message received.

"The static grid of icons has been the standard on smartphones," said Belfiore. "We decided not to use that tired old metaphor. Our way is to put people at the center of the experience."

People users interact with can be given their own tiles so that the latest interactions on email or social media are updated.

"It's the most personal smartphone operating system you can get and keeps you closer to the people that matter most in your life because of that," he said.

Belfiore announced a number of new apps that will be available for the platform including versions of Facebook, Twitter, Skype, Angry Birds, Urban Spoon and, from early 2013, the Internet music streaming service Pandora will be available. Windows Phone 8 customers will get a year-long free subscription to Pandora's ad-free service.

"We estimate 46 of the 50 most-used smartphone apps will be on Windows Phone 8," said Belfiore.

Users will have a selection of around 120,000 apps available for the phone, he said. "That's huge progress for us."

A new lock screen that shows app content, such as sports scores, news or favorite photos, rather than a static image, was another of the features shown Monday.

Microsoft also announced Data Sense, which helps users manage their smartphone data usage. Belfiore said the app had helped testers get 45 percent more Web browsing before hitting their data limit with the feature switched on.

To work, the feature needs carrier support. Verizon will be the first carrier in the U.S. to support it. Other carrier partners were not announced.

A similar tile-based home screen was used by Microsoft on Windows Phone 7, the predecessor to Windows Phone 8, but it didn't have the live updating feature.