**2. Genesis of smartphone**

A smartphone is a mobile phone that includes functions similar to those found on personal computers. They provide a one-stop solution for information management, mobile calls, emails sending, and Internet access [7].

It is of the large family of mobile phones and slightly larger than standard mobile telephones.

Mobile phone came into being by the end of 1940s with very limited functions. The very first mobile phone was heavy due to its size and is very expensive. Not everybody could afford it. There was no easy access to mobile phones and very few people could use them. Even if that phone was mobile, it was not easy to carry everywhere, and therefore it was used only in cars and some specific places. However, in 1982, the mobile phone of the first generation (1G) was created in the United States of America by the Bell Laboratories. It was a device with analogue voice. About a decade later, the mobile phone evolves to the second generation (2G). It became smaller, lighter, and cheaper. It functions on a Global System for Mobile Communication (GSM). Many people could afford a cellular then. It helped reducing the price of lines and promoted their integration into the business world since many conversations could be made simultaneously on a single channel. Communication became progressively easier and less expensive [8].
