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This is the Dynatac 8000x, it was the first cellphone that was marketed in 1984. It was developed by the company of Motorola, his inventor was Martin Cooper. It weighed 800 grams and it's software had a very low quality.

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In 1990, the first cell phone call was made using the new digital technology which was faster and more reliable than ever. The new technology also made cell phones capable of being smaller rather than the large and less portable cell phones from the 1980s

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At the time of the year 2000, cellphones, while being more compact, still were known for using keyboards attached to them. This was true, until on 2007, the revolution of the first ever iPhone, launched by Steve Jobs company "Apple" hit the market. The units sold of the product are estimated to be 6+ million units.

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NTT DoCoMo in Japan was the first company to experiment with fourth-generation technologies. It started approximately in 2010. It is known as 4G generation and facilitates access to various services such as telemedicine, teleworking, voice over the Internet and various applications that facilitate the daily lives of users. Furthermore, it offers a higher bandwidth than the previous ones and has speeds from 100 Mb/s to 1 Gb/s with 20 ms of latency. They are based on the main idea of stable and fast networks for internet connection, including Wi-Fi and Wimax.

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Nowadays, we know that in a couple of years the 4G generation will be completely replaced by 5G. The 5G network already exists and offers things like: All your devices can connect to your cell phone, they improve the availability and performance of the network when you move, which improves video calls, and they also improve the user experience in streaming videos, virtual reality, and especially, in online video games.
On the other hand, tools such as the camera have also improved, some cell phones now have 3 rear cameras and the quality is now better than some professional cameras of other years.