Even as Apple sells more iPhones, its share of smartphone market falls

Despite selling more iPhones than it did a year ago, Apple(s AAPL) dropped some share of the worldwide market for smartphone operating systems. It shipped more iPhones than a year ago — 31.2 million between April and June, versus 26 million the same quarter a year earlier — but went from a 16.6 percent share of the smartphone OS pie to a 13.2 percent share in the last year, according to IDC.

Still, Apple easily remained No. 2 behind the ever-growing market for Android(s GOOG) smartphones, according to IDC’s Worldwide Mobile Phone Tracker:

IDC smartphone OS marketshare Q2 2013

It’s been nine months since there was a new iPhone. While Apple continues to find new ways to sell iPhones, the entire market is growing at a faster pace. So it’s not unexpected that Apple’s share would dip while Android and Windows(s MSFT) phones would grow as new devices are continually released for those platforms.

The picture may look a little different this fall after iOS 7 and presumably new iPhones are released.