Market Research Reports 391% Jump in iPhones reports that in the United States, Research In Motion (NSDQ: RIMM) dominates with a 52% market share of smartphones. However, the situation is fluid, as evidenced by the roaring success of Apple’s iPhone, which has quickly captured 23.3% of the market. Sales of the iPhone jumped 365% in the second quarter, compared with the same quarter in 2008, according to the market research firm. RIM’s shipments of BlackBerrys jumped 29% in the same quarter.

It seems that the iPhone is somewhat buffered from the chilly economic climate. What would be interesting is to see how the Palm Pre changes the game, if any to really compete with iPhone’s market share.

RIM Owns Half Of U.S. Smartphone Market