Read the text. What happened in 1973, 1986, 1992 and 1997?

A brief history of mobile phones

» Nearly a billion mobile phones are sold every year worldwide.

» The first mobile phone call was made in 1973 by Martin Cooper. He was an inventor for a leading mobile phone company. The call was answered by the boss of a rival company, who was not happy to hear that he had lost the race.

» The first mobiles were powered by batteries that weighed nearly a kilo.

» Voicemail was added to phones in 1986. Internet access was not added for another ten years.

» The first text message was sent in December 1992. it was not typed on the phone itself but on a computer.

» The camera phone was invented in 1997 by Philippe Kahn. Photos of his newborn daughter were shared via his phone with 2,000 friends and family.

» In the UK, a mobile phone is stolen every three minutes.

» What are mobile phones used for the most? It isn't texting or calling — it's checking the time!