From the classic line to GSM and VOIP telephone history

It is popularly accepted that Graham Bell was the inventor of the telephone. Although the intellectual property of the invention is discussed, it was Bell who in 1876 laid the provision of improved telegraphy. In 1877, the first test was conducted by himself. The very first words would have summers: "Mr. Watson, come here. I must talk. "
Since then, improvements in the world of telephony has continued to evolve. Younger generations do not probably remember it, but when the phone was launched in early 1990, it was not immediately a revolution. The reason was simple: the first mobile phones were not quite the pinnacle of portability ...
GSM already has a long journey. It has become increasingly small. Telephone companies have increased their support in the form of subscriptions and of course, coverage. Unless voice, it became possible to also send short messages: text messages. It is strange to imagine today, but the first response to SMS was rather cold. What could we say in 160 characters?
It is thanks to young people who have created their own ingot SMS, the SMS started to experience a success. SMS came after MMS. The mobile phone is nowadays much more than just a device to make calls and send short messages. Music, photo, calendar, internet, or even console games: everything is possible with new cell phones.
Behind all this, there are different technologies. In 1997 we added the GPRS and GPS technology in 1999 for EDGE data transmission other than voice. Now it's 3G, mobile internet, which is all the rage. And it awaits the 4G.
But the phone, it can also happen through Internet networks, whether a telephone line (PSTN) or coaxial cable. This is called VoIP, Voice Over Internet Protocol. The advantage is reduced cost. The VOIP phone is implemented in many companies but for consumers, it also exists. Skype is the best example. However, the use of VOIP calls without a computer by cons phone specially designed for VOIP.