(Telecompaper) Android and iOS, the number one and number two ranked smartphone operating systems (OS) worldwide, combined for 91.1 percent of all smartphone shipments during the fourth quarter of 2012. Android smartphone vendors and Apple shipped a total of 207.6 million units worldwide during the quarter, up 70.2 percent from 122.0 million units shipped the previous year, according to International Data Corporation (IDC). For the calendar year 2012, Android and iOS combined for 87.6 percent of the 722.4 million smartphones shipped worldwide, up from 68.1 percent of the 494.5 million units shipped a year earlier.