Just one week after AT&T said it would be the exclusive carrier of the Nokia Lumia 920, T-Mobile announced Monday that the Bellevue-based company will exclusively offer the Nokia Lumia 810.

T-Mobile said that the new Windows Phone 8 smartphone will be available in the coming weeks, presumably after Microsoft releases Windows 8 on Oct. 29. Pricing has yet to be announced.

The Lumia 810 has a 4.3-inch OLED display and two cameras: an 8-megapixel camera that shoots HD video and a Skype-certified 1.2-megapixel camera up front. It also features Nokia Music, an ad-free music player, and touts enhanced navigation features like Nokia City Lens and Nokia Drive.

Nokia, HTC and Samsung have now all announced Windows Phone 8 devices. They must be hoping that Windows 8 helps Microsoft be more competitive in the smartphone race — the most recent numbers show otherwise.

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