Get mobile back covers for every model at Harvey The biggest invention of the last part of the 20 th century is the Internet. It was previously known as WWW or World Wide Wave. Later google was invented. But the most worthy invention of the last century was mobile phones. Mobile phones are also known as cell phones or cellular telephones in the USA. The first handheld cellular phones were invented by John F. Mitchell and Martin Cooper of Motorola in 2973. It was an experimental process where the cellular phone weights almost 2 kilograms. At first cellular phones were used only for telephone purpose. It was working on radio frequency zone. The call was connected when both the persons were under cellular network zone. Later in 2000, cellular phones were started being used for many purposes. Like for sending SMS(text messages), MMS, e-mails. Then playing video games, internet access all were started gradually. In this decade, mobile phones are being used as a substitute for compu