If you’re drooling at the idea of buying the just announced (at CES) Nokia Lumia 900 Windows Phone unit, know that you’ll be able to get the 4.3 inch smartphone for $99.99 on AT&T starting March 18th. The info comes from AT&T’s Q1 2012 roadmap.

Of course, the price applies to a 2 year contract and this flagship smartphone will feature about the same specs as the Lumia 800, aside from the bigger display, obviously. We have a single core 1.4 GHz processor, an 8 megapixel camera, Windows Phone Mango OS, 512 MB of RAM and a 800 x 480 pixel resolution. Keep in mind that the phone has yet to receive technical approval, so we may be in for a delay.

The price point could make this handset a huge hit, like it was in the UK and France. I must remind you that Nokia sold over 1 million Lumia units since these models were made available late last year. With the Lumia 900 and rumored Lumia 910 12MP model coming, things might get big this year.