Forrester Research says there are 1.5 bln mobile telecoms users today. A further 3.5 bln people live within the coverage area of a mobile cellular network. To grow their base by a further 1.5 bln mobile users, handset manufacturers and mobile operators need to turn to emerging nations and provide cheap phones and services for low-income consumers. Mobile networks cover 80% of the world's population. Some 5 bln people are within range of a public cellular network. Mobile users comprise 25% of the world's population. 78% of mobile users connect via GSM networks, followed by 14% that use CDMA technology, and 6% on TDMA networks.