Chart - US Smart Phone Share By OS

eMarketer estimates there will be 140 million smartphone users in the US by the end of this year, up from 121.4 million last year and set to reach 159.9 million by 2014. Nearly 46% of this year’s users will run Android on their phones, while 38.3% will run iOS.

Those figures represent growth in share as well as absolute numbers for both operating systems, which comes as BlackBerry and other systems besides Windows Mobile have all lost ground. Apple and Google are consolidating their positions as the top two smartphone operating systems in the country by far. Read the rest at eMarketer.