The number of people using mobile devices across the globe is expected to reach 5.5 billion by 2022, according to a new report.
Forrester is anticipating that mobile users will have almost doubled from 2.8 billion in 2008 to 5.5 billion in five years' time.
In addition, it is expected that more than 50 per cent of the global population will be using a smartphone by 2022, meaning brands need to make sure their content is optimised for mobile and they are focusing a significant part of their marketing strategy on this growing user base over the next few years.
Forrester found that Android phones currently account for 73 per cent of the market, or around 1.8 billion users, followed by Apple (21 per cent) and Windows (four per cent).
The report authors predicted: "Powered by the low-cost smartphone manufacturers in China, Android will retain its dominance in mobile operating systems."