I guess many of you have been using NTC pre-paid sim. NTC stops incoming and outgoing calls after you haven’t recharged your mobile after the expiry of the date. If you do not want to spend money and increase expiry date of your prepaid SIM follow these instructions:

You can still receive SMS even after you SIM is expired. If someone sends you balance of RS10, then you will receive it and your date will be increasing by one day. Even if money is sent after some days of expiry date will be increased to of that day. This will increase you date by one day (until 12 A.M) only and you can do this unlimited time.

Note : We are sorry to tell than NTC has fixed this issue :(