The price of Nokia Oyj (NOK1V)’s Lumia 900, which the company is counting on to challenge the iPhone and Android devices, was cut in half to $49.99 at AT&T Inc. (T) (T) stores. The product is available at that price with a two-year commitment, according to AT&T’s website. AT&T began offering the phone in April, following the debut of the Lumia lineup in the U.S. on T-Mobile USA’s network in January. North America was the only region where Espoo, Finland- based Nokia saw handset shipments grow sequentially in the first quarter, helped by the release of the Lumia 710 on T-Mobile. Still, the 600,000 units shipped marked a 50 percent decline from a year earlier. Read the full story at Business Week.