In modern global world, mobile phone has been a part and parcel of our life. It is a great invention of modern science. It is called so because a user can carry it wherever he goes out. It has brought about multidimensional changes in our daily life. Nowadays it is regarded not only as a communicative device but also as an inseparable part of modern life. Using mobile phone, one can take a snap of anything, record voices and videos, compose songs and ring-tones, edit wallpapers and what not. Moreover, GPRS or WAP enabled mobile sets have created multifarious possibilities providing us with the opportunities of internet chatting, gaming, exchanging MMS, mailing, browsing etc. Besides, Bluetooth and Wi-Fi technologies of mobile phone can create PAN (Personal Area Network) in which the intended mobile users can easily and instantly exchange all sorts of data and information from one mobile device to another. It has made the interpersonal communication very easy and fast. One can communicate with the expected person within a few seconds through a mobile phone. Business communication has become easier because of the use of this device. Actually most of the businesses are depended on this speedy mode of communication. It is also helpful for the students. They can get suggestion of their studies from their friends and teachers. So, the number of consumers of mobile phone is increasing day by day. It makes the world smaller and brings all closer. But, it is unfortunate that it has some negative aspects too. Criminals also use it for their activities. It causes some health hazard. Scientists believe that it causes brain tumours by its invisible and uncontrolled radiation. Particularly the pregnant women and children should not use it at all. Despite all these, mobile phone is a blessing for us.