Text messaging being a service used only in Europe and Asia is becoming an important form of communication in the US.
NPD Group having researched this area announces that 40% of the nation's 220 million mobile phone users sending text messages regularly. They report that about 21 percent of U.S. subscribers have downloaded a ringtone (although only about 10% can be considered "active" downloaders), while about 9% have downloaded a mobile game.
U.S. subscribers sent close to 65 billion text messages through the first half of this year. That's about double the number sent in the first half of 2005, reports CTIA.