If your Sim card is lost (Theft/Stolen) then you can easily block or disable it in seconds irrespective of your service providers(Airtel,Idea,Reliance,BSNL,Tata Docomo,Vodafone,Aircel). Here is a complete procedure to block a lost Sim card .The very immediate step you need to do when you lose your Sim Card is just Block it ,because someone may misuse your Sim card for which you may be penalized as it is associated with you.The steps/things to do when you find that your Sim card is lost.
1.Immediately contact Customer Care of your network/Service provider .The service providers like Airtel ,Idea,Reliance,BSNL, Tata Docomo,Vodafone,etc will have a local customer care numbers like 198,369,....
2.When you request for the Sim block, the customer care person will ask some details for verification of the Sim Card Owner.They may ask some questions like:
- The Phone Number?
- Subscriber Name?
- Last Amount Recharged?
- Mode of payment you used for last recharge? (like:Online Recharge,Phone Recharge,Top Up Card).
- The Validity of your Sim Card?(Note:You can check the validity when you check for balance amount in your cell phone or on the cover of your Sim card during your purchase).
3.When the customer care person is satisfied with your answers, he will block your Sim card or block out-going calls for your lost Sim card and suggest you to have a Sim replacement(You can get a new Sim card issued by your network provider without changing the number.) at nearest customer relationship center by providing your id proof and photo copy.Check here how to get sim replacement.