Life in twenty first century is totally incomplete without modern technology. One can imagine how tough human life was few centuries back when powered vehicles, modern tools of communication, internet and other forms of electronic equipment were not invented. Telegraph and telephone can be said as the early ancestors of mobile phone. Undoubtedly, they are slow and obsolete as per modern time but their importance should not be neglected. It would not be wrong to say that telephone is one of the phenomenal inventions of the twenty first century. The advent of wireless technology gave birth to inventions such as […]