Part of our global mobile and smartphone adoption forecast, this forecast details mobile subscriptions and mobile subscribers (people) in the US. It also includes smartphone installed base and subscriber data. The forecast includes smartphone ownership demographics by age as well as subscribers by operating system (2011 to 2015 only). It includes historical data going back to 2008 plus a five-year forecast. To get a global comparison, please view the Forrester Research World Mobile And Smartphone Adoption Forecast, 2015 To 2020 (Global).