AT&T has confirmed that Nokia's upcoming Windows Phone device for the U.S., the Lumia 900, will launch on April 8th for just $99.99 on contract. The handset will be one of the most affordable flagship devices AT&T has ever sold thanks to what is reportedly a huge investment from Nokia and Microsoft. In contrast, a typical flagship phone will sell for $200 or more at all major U.S. carriers.

As previously reported, the device will have a 4.3-inch ClearBlack AMOLED display, a 1.4GHz processor, 512MB of RAM, an 8-megapixel Carl Zeiss camera lens, and a high capacity 1830 mAh battery. It will ship with Microsoft's Windows Phone 7.5 operating system and will be compatible with AT&T's LTE network.

The Lumia 900 marks Nokia's second Windows Phone to land in the states this year. Its lower-end sibling, the free-on-contract Lumia 710, is getting decent reviews from users and has reportedly been selling well through T-Mobile since its launch in January. With an aggressive pricing strategy and marketing campaign, alongside availability through a larger carrier, Nokia hopes the higher-end Lumia 900 will be abble to steal some market share away from the iPhone and a host of Android smartphones currently dominating sales.

The phone will be available in matte black and cyan blue, while a white version arriving on April 22. An HSPA+ version of the Lumia 900 supporting 42Mbps connections will hit global markets sometime in Q2.