Chart - US Smart Phone User Share By OS

Among US smartphone owners, Android-based handsets are the most popular, and eMarketer estimates that they will reach 50.0% penetration this year, while iOS-based handsets continue to claw back share slowly, with 40.5% of the market expected for 2014. Both major operating systems will continue to make slight gains as BlackBerry, Windows Mobile and other operating systems continue to lose significance. Read the rest at eMarketer.