Africa is leading the market when it comes to mobile phone usage, having posted the strongest increase in new users over the last two years. In fact, more that two-thirds of all mobile phone users hail from developing countries. 

These are some of the results of an ITU study, which reveals there were about 3,3-billion mobile phones users by the end of last year – a staggering 49% global penetration rate.
Growth in mobile phone subcribers climbed 39% in Africa between 2005 and 2007, with Asian growth following at 28%.
Worldwide, mobile phone usage grew by 22%.
Developing countries still trail the rest of the world on broadband connections, however, with 66% of broadband connections still being in high-income countries.