What is SIM card cloning?Cloning of a GSM phone is achieved by cloning the SIM card contained within, but not necessarily any of the phone’s internal data. GSM phones do not have ESN or MIN, only an International Mobile Station Equipment Identity (IMEI) number.
Our cellphones are working on two network such as: GSM and CDMA. Both these network offers good call quality and other technical features which separates both network from each other. However CDMA network are more vulnerable to sim cloning than GSM network. In CDMA(code division multiple access) mobile phones cloning is achieved by changing the Electronic Serial Number(ESN) with the help of special software’s. The Electronic Serial Number(ESN) is usually transmitted to the telecom company to authenticate any cellphone/device onto the network. By modifying Electronic Serial Number (ESN),Preferred Roaming List(PRL) and Mobile Identification Number, any fraudster can make fraud calls to raise original subscriber mobile bills.
While on the other hand in Global System for Mobile Communication (GSM) mobile phones contains International mobile station equipment identity(IMEI) number instead of ESN number, which means fraudster have to get IMEI number to clone original sim card to create duplicate one. But this process is very typical on GSM mobile phones as this is a rare procedure to be followed by fraudster’s.A GSM Sim card is copied by placing a device(special device) between the handset and SIM card which allowed device to be operational for few days to copy its contents/secret code. This process takes time to copy original GSM Sim Card to create duplicate one.
How to know if my SIM card is cloned:
A duplicate/cloned SIM card can be used for robbery,ransom or terror activities. So every mobile subscriber need to be vigilant for his/her cellphones usage activities. There are few conditions in which one can know whether his/her cellphone is cloned or not such as:Frequent cross connections and wrong numbers.Too many Unknown numbers in telephone bill.Receiving busy signal when you are not on call.Experiencing slowness in accessing mobile banking and emails(even on 3G network).
What to do if my SIM card is cloned:
If you face any issue regarding SIM card cloning, then contact your telecom operator and nearest police station to register your complaint.