Though still fourth among the top five mobile-phone players, Apple outshone its global rivals in the second quarter with skyrocketing shipment growth and a surge in market share, according to a new IDC report.

Released yesterday, IDC's report found that Apple shipped 20.3 million iPhones in the quarter, a leap of 142 percent from the 8.4 million shipped in the prior year's quarter. Among the top five vendors, Apple also saw the biggest jump in market share, capturing 5.6 percent of global mobile-phone shipments, compared with 2.6 percent a year ago.