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Once the mobilephone network validates these pieces of information, service is allowed. To make a mobilephone call (analogue) the system requires two pieces of information, mobile identification number (MIN) and electronic serial number (ESN), commonly referred to as the handshake. Unfortunately, while such calls might well be free to the caller, no such luck for the genuine renter/end-user. Here the object of the exercise is to make calls free of charge. The idea behind the cloning of mobile communications is simple. When we look up the dictionary meaning of cloning it states, to create the exact replica or a mirror image of an subject understudy.

Keywords Mobile phone cloning, GSM, CDMA, IMEI, SIM, ESN and MIN, Patagonia. It gives an insight into the security mechanism in CDMA and GSM phones along with the loop holes in the systems and discusses on the different ways of preventing this cloning. This paper describes about the cell phone cloning with implementation in GSM and CDMA technology phones. So when one gets huge bills, the chances are that the phone is being cloned. Though communication channels are equipped with security algorithms, yet cloners get away with the help of loop holes in systems.

As a result, while calls can be made from both phones, only the original is billed. The other cell phone becomes the exact replicate copy of the original mobile phone like a clone. Mobile phone cloning is a technique where the data from one cell phone is transferred into another phone. Because of its usefulness and importance in business and other normal lifestyle, it is subject to fraud. It provides most valuable service to its users who are willing to pay a considerable premium over fixed line phone such as landline, to be able to walk and talk freely.

Sonal1, Upasna2 1,2Department of Computer Science & Engineering, Ganga Institute of Technology and Management,Ībstract Mobile communication has been most popular from many years, and is major need of todays business and life.