Abstract:

The suspicious cellular phones characterized cloning are distinguished from call records of the calling number by the sweep analysis of feature points matching with calling-time-length，calling-times，user-mobility and calling-time-overlapping.The analyis algorithms of accumulation of talk time and call counting for different kinds of called number，velocity of user movement and time conflicts of calling.Based on these analysis algorithms of call records，a anti-clone system is implemented.An application demonstrates that the analysis algorithms have the intense accuracy and reliability，thus it can provide a more flexible technique of anti-cloning for the operators.

Key words: mobile telecommunication, cellular phone cloning, UIM card, call record