AT&T is now accepting pre-orders of the Lumia 900 ahead of the April 8th release in the U.S. The pre-orders are happening through AT&T retail stores and online stores. You can pre-order matte black or cyan blue right now. However the white version will not be available until April 22nd. The Lumia 900 can be purchased for $100 plus two year agreement. However Walmart is offering the device for only $50 with a two-year agreement.