New York - Microsoft and AT&T unveiled a portfolio of smartphones based on the Windows Phone 7 operating system.

The unveiling was done at a press conference that is still taking place, here.

The smartphones from HTC, LG and Samsung will reportedly be available exclusively for AT&T customers ahead of the holiday shopping season.

Each of the three smartphones  feature a capacitive glass touchscreen, 5-megapixel camera and a 1GHz Snapdragon processor, but they are designed to appeal to different types of customers.

The new Windows Phones for AT&T customers:

•   HTC Surround features integrated Dolby Mobile and SRS surround sound speakers. The speakers slide out and reveal a kickstand for watching video beneath its 3.8-inch touchscreen. It's designed to blur the line between home and mobile entertainment.

• LG Quantum has a slide-out keyboard for use of Office Mobile. It also features DLNA technology through a preloaded application called Play To, which allows users to wirelessly stream videos, music, and pictures from the phone to a DLNA-enabled TV, stereo, Windows 7 PC and other consumer electronics devices

• The Samsung Focus is described as AT&T's thinnest Windows Phone and offers a Super AMOLED screen on a 9.9 mm-thin touchscreen phone.

All three Windows Phones from AT&T will be available in AT&T company-owned retails stores and online at www.wireless.att.com for $199. The Samsung Focus will be available on Nov. 8 and the HTC Surround and LG Quantum will be available in time for the holidays.

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