[1]Research firm NPD Group said Verizon Wireless' aggressive "buy-one-get-one free" promotion on BlackBerry devices has helped the BlackBerry Curve surpass the iPhone as the best-selling smartphone in the U.S. in first quarter of 2009. Release [2]. See a slideshow of the top-five smartphones here [3].
Links:
[1] http://www.fiercewireless.com/slideshow/best-selling-consumer-smartphones-u-s-first-quarter-2009
[2] http://www.fiercewireless.com/press-releases/rim-unseats-apple-npd-groups-latest-smartphone-ranking
[3] http://www.fiercewireless.com/slideshow/best-selling-consumer-smartphones-u-s-first-quarter-2009