async='async' crossorigin='anonymous' src='https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6389256843466666'/> GK HIMACHACHAL 2021: September 2023

The Invention of Mobile Phone

  The Invention of Mobile Phone :-  Er. Martin Cooper  The Father of Cellular phone  Today every one is conversant with the mobile phones , ...