Beware of a new strategy from some Pakistanis. It has happened to me and can happen to you too. You will get a missed call from an international no. which 92 meaning originating from Pakistan. You will call back in curiosity without thinking it is from Pakistan and an ISD call and they will tell you about some prize etc. Just beware and check the country code and do not call any such no. And of course don't spread your mobile no. indiscriminately. The phone no. from which I got a missed call is 923005133131 So see country code before calling back any no.