The BlackBerry Curve has moved past Apple’s iPhone to become the best selling smartphone in the United States for the first quarter of 2009. We all know that Research in Motion has been manufacturing the referred smartphones of the corporate smartphone market for sometime now and now they are really dominating as they have three of the top five best-selling consumer smartphones in the period.

According to NPD, a research group, the Blackberry Storm is ranked at #3, the Blackberry Pearl at #4 and T-Mobile G1 at #5.

The iPhone was the top-selling smartphone for both the third and forth quarter of 2008 while the curve was second with the Palm Centro third. According to NPD credits for this rise of the Blackberry Curve is to go to a joint venture between Verizon Communications Inc and Vodafone Group Plc, a “buy-one-get-one” promotion by Verizon Wireless which helped to push the Curve pass the iPhone.