Additionally, Strategy Analytics also added that total smartphone shipments went down by 5 percent per annum, giving way to over 23.8 million units (from 25.2 million) in the U.S. during the second quarter of 2012. The firm notes that this is one of the slowest growth rates in the U.S. smartphone market. With rumors of an iPhone 5 expected to arrive later this year, it will be interesting to see how Android will manage to keep its disposition in the U.S. market. Meanwhile, the research also shows RIM and its BlackBerry OS dropping from 11 percent to 7 percent over the past year. Strategy Analytics says that this is RIM’s lowest level in history.