Global mobile device usage is expected to reach more than 5.5bn users by 2022

Mobile phones are expected to be in the hands of  66% of the world's population by 2022, with mobile device usage slated to reach 5.5bn users by then.
That is almost double the total number of users (2.8bn) in 2008, according to a report by Forrester, with up to 3.8bn new users predicted during the next five years, crossing the 50% mark for smartphone use by population in 2017. 
The report noted that smartphone use is expected to increase particularly in Asia and Latin A