Mobile phone is one of the wonderful wonder of science. It is a telephone system that works without any wire. All classes of people use mobile phone. Through mobile phone, we can sent messages to distant places, play game and sports, know about time, solve the work of calculation. However with the touch of science and technology, the whole world seems to be a global village. In a single moment, we can communicate with the people living in a very distant place. With all its advantages, the mobile phone has still some drawbacks in disguise. Trough the price of it is decreasing, per minute bill is not decreasing. So everybody cannot possess it. Scientists have recently discovered that mobile phone can cause cancer to the users. Besides, it has become a fashion with the young people. Last but not the least, terrorists are using it to spread out terrorism all around the world. But in spite of all these disadvantage, it can be finalised here that the necessity of a mobile phone in exchanging massages, cannot be denied in the true sense of the term in our practical life.