Try Your Luck Give a missed call to win Rs.500 talktime, absolutely free!!
Give a missed call to the number " 18002126677 " , call will get auto disconnected. After that you will get a call back immediately on your number. In that call you will be asked for a 5 digit code, put that randomly as you wish ( I won Rs.500 using code starting with 372.., as far I remember.
3 chances they are giving in each call; and if you don't win, don't worry, you can call again after few minutes (I don't know total how many times they are giving chance from a single number, for me it took 3 times to call to win.
Try your luck...., and best of luck