Android operating system runs on three out four smartphones in the world.

In a recent study by an IT market research firm Gartner says  three out of four of smartphones around the world are now running the Android mobile operating Software.

In its report says Google’s mobile OS now has a 72.4 per cent share of the market and it is increased from the 52.5 per cent in a year ago and Samsung is the most prominent user of the OS.

In the second place Apple iOS stands with around 23.5 million phones over the same period, the third quarter of 2012. That was up from 17.3 million a year ago, but the rise was not enough to stop the market share of the Silicon Valley company’s operating system slipping from 15 per cent to 13.9 per cent, the paper said.

According to the paper, the survey said the fall in Apple’s market share could have been a result of users around the world waiting for the release of the iPhone 5 in their countries.

“With the launch of iPhone 5, Gartner analysts expect iOS share will grow strongly in the fourth quarter of 2012 because users held on to their replacements in many markets ahead of the iPhone 5 wider roll out,” the firm added.