Communication plays a crucial part in today’s world. Almost all the spheres of human activity are completely dependent on the way and the manner in which we communicate with each other. One advancement in the field of communication that has been a blessing to the people the world over is the advent of mobile technology. No other technology has received the admiration as well as the warm reception from the common man as the mobile phone technology. Even in the field of mobile phone technology the arrival of GSM mobile phones has been one of the most watershed events. The GSM mobile phones have completely altered the way people communicate over their mobiles. It enables the user to keep the same GSM mobile phones no matter to which part of the world they are traveling. GSM or the Global System for Mobile Communications technology was developed as the result of the endeavors of the scientists and technicians in Europe to have a standard for the mobile phone system throughout Europe. Launched in the country of Finland, the use of GSM mobile phones has only grown manifolds. Almost all of the mobile carriers are using this technology to make sure that the common man has the best in terms of communication. The Unlocked GSM cell phones have redefined the manner in which the world communicates. The pace at which the Unlocked GSM cell phones are becoming popular worldwide, it is really going to be the future of the human way of communication. Globally, GSM penetration has been remarkable. These mobile phones are preferred because of easy SIM based subscription process . Customers can chose handsets and operators as per their need and budget. Net surfing, live portals are some of the value added services that the customers can avail. With the development of new technologies, GSM has given a new definition to communication.