Here are four graphs that explain the iPhone’s impact on the smartphone industry and how we communicate. In the years since the iPhone made its debut, smartphone ownership has skyrocketed.

Similarly, 55% of girls with cell phones talk daily on their cell phone, while 47% of cell phone-owning boys report the same. The older the teen, the more likely she uses her phone frequently. Older ...

Cell phone use graph in Research Findings: MARC 2011 Survey Grades 3-12 Elizabeth Englander/Bridgewater State University. Cell phone owners are getting younger and younger.