Updated: Target Mobile is offering existing AT&T customers the opportunity to preorder and upgrade to the Nokia Lumia 900 4G LTE Windows Smartphone in Matte Black for $19.99 (contract-free: 749.99, carrier subsidized: 99.99 – 80 instant savings) with two service agreement for a limited time. It is scheduled to ship April 22, 2012. Shipping is Free.

Amazon has the Nokia Lumia 900 4G LTE Windows Smartphone in Matte Black or Cyan for $49.99 with two service agreement for new or existing AT&T customers for a limited time. Shipping is Free.

The Nokia Lumia 900 features include a 4.3″ 480×800 AMOLED screen, 1.4GHz Qualcomm Snapdragon processor, 8-megapixel autofocus rear-facing camera with dual LED flash and Carl Zeiss Lens optics, 1-megapixel front-facing camera, 16GB internal memory, Xbox LIVE integration, Zune music player, Bluetooth, 1830 mAh battery (up to 7 hours of talk time), Windows Phone 7.5 OS, and more.