Introduction:
The mobile phone is the great invention. The mobile phone was discovered by Martin Cooper on 3 April 1973. Martin Cooper was a Motorola researcher and he made a 1st first mobile phone. He made a call from handled subscriber equipment. His invention leads to the inventions of other mobile phones, like Nokia, Apple, Blackberry, Samsung etc.In past days, people send their important message through the post which takes many days and months. A postman came he collects letter then he travels for person home for whom the letter is written and gave the letter. This takes many days. After the invention of mobile the world has changed. Now people can send the message in just seconds to their beloved ones. This invention proved very convenient for people. 

Telephone and mobile:

Although telephone is also convenient but it can not compete with the mobile phone. Mobile has more features than the telephone. Through mobile, we can send messages. But through telephone, we cannot send messages. We can take the mobile with us anywhere whereas telephone cannot be taken anywhere. 
Smartphones advantages:
Smartphones the modern invention let the world totally changed.
Through smartphones, we can see one another. Smartphone lessen the distance and brings people close to one another. Through smartphones, we can call, chat, video chat, and talk with people who are far apart from us. Smartphones decreases distances and brings people close. Smartphones are the best invention ever according to me.