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BlackBerry Curve 8300
The President is well known to be a fan of the BlackBerry. So much so, that he has two of them. Identified in this picture aboard Air Force One as two BlackBerry Curve 8300 handsets, while his other is understood to be a BlackBerry Curve 8900.
BlackBerrys are, at least for now, one of the very few mobile devices approved by the U.S. government for low-level classification document sharing, but the iPhone is not far behind. In May, iPhones and iPads were approved by the U.S. Defense Dept. just a week after the federal government cleared the older iOS 6 software for use in government.