Prior to the development of mobile phones, people used two-way radios to communicate while they were mobile. The idea behind two-way radios gave rise to the invention of mobile phones.
Nowadays, the mobile phone is so important to us that it’s hard to think of life without it. However, they're a relatively new invention.
On 3 April 1973, Dr Martin Cooper, who was a Motorola employee, placed a call to rival Joel Engel, who was head of research at AT&T. Doctor Martin made the call while he was walking the streets of New York & did so through the first Motorola DynaTAC prototype in front of journalists.
The earliest mobile telephones were dubbed first generation telephones, often referred to as 1-G. These devices were the very first real mobile telephones, although they were then known as cellular mobile radiophones, & were based on analogue signalling. The analogue signal was the main difference between these first generation mobile telephones & their second generation cousins, which came out a few years later.
Second generation (2G) digital cellular systems were first developed at the end of the 1980s. These systems digitized not only the control link but also the voice signal. Unlike 1-G phones that were analogue, 2G phones use digital signalling to provide voice services & for text messaging & WAP internet access. Some of the benefits of 2G phones are that they use lower radio signals, which require less battery power. This means that phones lasts a lot longer between charges.
The earliest pre commercial 3G mobile phone network was launched in Japan in May 2001. Later, 3-G was released commercially in Japan on October 1 2001. 3G is the third generation of mobile phone standards and technology, which succeeded 2G mobile phone technology. The birth of 3-G technologies enabled network operators such as orange to offer their users a bigger range of advanced services. This includes broadband internet, as well as high tech video calls.
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