In 2017, 5 billion people will use cell phone

peopel with mobiles

Four years from now, 5.1 billion people will be mobile phone users around the globe — almost 1 billion more mobile users than the 4.3 billion people worldwide using them now.

Asia, the region that will see the most growth, is already home to the most mobile phone users. Some 2.4 billion people there use mobile phones, a figure projected to grow to 2.9 billion by 2017.