the end of 2009. In February 2010, there were 4.6 billion mobile subscribers, a number that is estimated to grow. Total mobile-cellular subscriptions reached almost 6 billion by end 2011, corresponding to a global penetration of 86%.

History

Prior to 1973, cellular mobile device technology was limited to devices installed in cars and other vehicles. The first fully automated telephone calling system for vehicles was launched in Sweden in 1960, called MTA (mobile telephone system

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