Chapter 4. Understanding broadband: addressing issues of capacity, speed and quality of service Figure 4.1: The rise of 3G: countries that offer 2G/3G services commercially, 2010 88 5 2G Mobile-cellularsubscriptions, billion 3G* 4 3 2 1 0 2005 2006 2007 2008 2009 2010 Note: * 3G data include dedicated mobile data subscriptions. Source: ITU.