Next time if you get a missed call starting with +92; #90 or #09, don't show the courtesy of calling back. BSNL has issued alerts to subscribers — particularly about the series mentioned above — saying that calling the number back after a missed call may make a user susceptible to SIM card cloning. There is, however, confusion over this claim made by some BSNL and intelligence officials. Cloning a SIM card requires physical access to it or the interception of the communication between the caller and his or her cellphone operator's network.
