![sddq.jpg](https://cdn.steemitimages.com/DQmPHJYD1kY2FfuRMdZ5EVjpJpXnA34oi2VKMEMi2KAna73/sddq.jpg) **I made it using illustrator** Mobile phone, the most used technology in the world right now. It is such a device which is used by everybody. A person who is a farmer or scientists or an engineer or doctor, every person is using a mobile phone. it is used in every sector of life. ![amir-hanna-sweUF7FcyP4-unsplash.jpg](https://cdn.steemitimages.com/DQmadYMTsE8toBuG2HrTWFXwkfVhzVLnUscA6rZm2C2iLnf/amir-hanna-sweUF7FcyP4-unsplash.jpg) **I took this picture from the net. Here is the [Source](https://unsplash.com/photos/sweUF7FcyP4)** There was a time when people send any news to other using pigeon or horse. Hand to hand passing system was then. But then comes a time while people start using email, fax etc. for communication. Then comes mobile phone. using mobile phone, the way of communication is totally changed. Now one can speak directly using mobile phone. Firstly, the world meets with the 1G phone, there only voice call is possible. No message sending is possible on that device. ![sumeet-singh-okfXVsBHAtQ-unsplash.jpg](https://cdn.steemitimages.com/DQmdcy61FRT59erGCz6zFYV7D5yFQG7TuiFm6tdyoVdugmQ/sumeet-singh-okfXVsBHAtQ-unsplash.jpg) **I took this picture from the net.Here is the [source](https://unsplash.com/photos/okfXVsBHAtQ)** Then comes 2G mobile phones, here voice call is possible and people start using internet. Internet meets here. By using internet, it is possible to know everything. Google, Facebook, WhatsApp, etc. meets at 2G phone. But the speed of 2G mobile phone was not so impressive. Then comes 3G phone. Here video calling started. Using 3G sim cards with 3G phones, anyone can use video calling. It doesn’t matter the opposite person is were. Just by one click, he or she can call the other. By using this technology, he can saw the person on his mobile phone. Here on 3G mobile phone, internet speed is very high compared to previous. ![rayson-tan-PjzmDD_hPMY-unsplash.jpg](https://cdn.steemitimages.com/DQmTSRYhyoLvL99jLN3ZC7mNEGED3hy6t6TmW5nC6JuWQEr/rayson-tan-PjzmDD_hPMY-unsplash.jpg) **I took this picture from the net.Here is the [source](https://unsplash.com/photos/PjzmDD_hPMY)** Then after 3G there comes 4G phones. Here different technology meets as well as the previous technology also presented. Here, internet speed means browsing speed increased a lot. Now, except some developed countries, most other countries in the world using 4G techniques. But some of the developed countries are using 5G technology. ## Conclusion Those are the so-called versions of mobile phones. In the modern era of this world is being impossible without mobile phone. And the people of south-Asia are very much interested in mobile phone. There is various report which says that number of mobile phone is greater than the number of person lives in this area. ## Source - https://en.wikipedia.org/wiki/Mobile_phone - https://www.techopedia.com/definition/2955/mobile-phone#:~:text=A%20mobile%20phone%20is%20a,video%20players%20and%20navigational%20systems.