Kantar: Android still leads in the US but iOS catches up

Apple's platform has seen its share rise by 3.3 percent points over the same period last year. With 42.5% of all smartphone sales, Apple comfortably sits in the second position with no real treat from Windows Phone or BlackBerry OS.

Microsoft's Windows Phone is the other OS to improve its standing reaching 4%, up from last year's 2.9%. Despite launching its revamped OS at the start of the year, BlackBerry continues to lose ground in the US market. The BB OS share has dropped to 1.1% from 4% over the same period last year.

The sales of the Android smartphones were largely from Verizon, which has managed 35% of the overall sales, while Sprint, AT&T and T-Mobile accounted for 17%, 16%, and 13%, respectively. 40% of iOS sales also came from Verizon, while AT&T attracted 39%, Sprint had 10% and 8% was from T-Mobile.