In the fierce battle to rule the smartphone landscape, Google's Android platform has not only maintained, but extended its lead against Apple and others.

Market researcher ComScore said late Thursday that of the 78.5 million U.S. smartphone subscribers, over 40 percent were running Android operating systems in June, a jump of over 5 percentage points.

Arch-enemy Apple, with its iOS that powers the iPhone 4 and older iPhone models took second place with 26.6 percent market share.

The gain represented the strength in numbers of manufacturers deploying Android devices, versus the sold distributor or the iOS, Apple.

South-Korea's Samsung ranked as the top original equipment manufacturer (OEM )with 25.3 percent of U.S. mobile subscribers for June, followed by LG with 21.3 percent share and Motorola with 14.5 percent share.

Apple strengthened its position at No. 4 with 8.9 percent share of mobile subscribers , but its volume was not enough to compete.

While making a relatively poor performance in June, 

Apple out sold and out profited smartphone rivals in the second quarter, according to IDC, making it the No.1 global vendor with 20 million units sold.

The ComScore data was based on a survey of more than 30,000 U.S. mobile subscribers.