How to Activate your sim card instantly

When you buy any new sim card, the shopkeeper will tell you to wait for few hours/days to get the sim
 card activated.
When you purchase a new sim card you will get two or three papers in which you have to fill the details.
Check the page in which your mobile number is written and near your number you can see SR NUMBER [serial number].
You can also find SR. No. on sim card's slip on plastic cover.

If you want instant activation then insert your sim card in your Mobile and then Dial the Serial Number two times.
Thats all. Your sim card will be activated within one minute.