How to Block SIM Card using USSD Code


Are you replacing your old number or want to block your SIM CARD forever?

Well, in this post you will learn how to block SIM card permanently using a USSD code.

Here at Elkees Media, we keep on posting mobile tricks including free recharge coupons, free value-added services, free antivirus, free apps etc and today we have come with a latest mobile trick to block sim card permanently.

block sim card

What is USSD? USSD stands for Unstructured Supplementary Service Data, it is a protocol which uses by GSM (Global System for Mobile Communication) cellular telephones to communicate with the service provider.

Dial USSD Code to Block Sim Card Permanently

Look upon below USSD code that will help to block sim card forever.

Simply, dial this USSD code on that mobile which phone’s SIM card you want to block.


As soon as you enter this USSD code, it will proactively ask you to enter PUK (Personal Unlock Key) code.

You must know PUK code of that sim card you want to block.

In case you don’t know PUK, just contact your telecom service operator to get the PUK code.

The above secret code to block sim card is working fine with all major telecom companies in India including AirTel Cellular, Vodafone, Idea Cellular, BSNL, MTNL, Tata Indicom, Reliance, MTS, etc.

NOTE: Entering wrong PUK code more than 10 times, would block your SIM card permanent and could not be reactivated later on.

Contact Your Telecom Service Provider to Block SIM Card Temporarily

If you want to block sim card on a temporary basis, you may contact your telecom service provider.

Simply call the customer care representative and tell them that you have lost your sim card and want to block incoming and outgoing immediately.

After some telephonic verification, they will block your sim card, most probably.

You can contact cellular mobile service providers in India by just calling a toll-free number 198 from any of your GSM/CDMA mobiles.

Basically, PAN-India number 198 is for registering complaints and requests only.

Also see: How to Listen to Other Phone Calls Secretly?

There is also some daily call limitation to 198 for each Indian telecom operators.

For more information, please get in touch with your operator.

However, blocking sim card through telecom operator may be the easiest way.

But, what about the above USSD code to block sim card permanently?

Is it working for you?

I need your feedback to keep the post updated. Please share your comments below.


    • There is no such way (USSD code) to unblock GPRS data blocked sim card due to attempting to enjoy free internet tricks however you can try contacting your telecom service provider with a polite email to unblock internet services on your sim card. Try to convince them so that they can help you in this matter. I believe it will surely fix your internet problems.

    • If your SIM card has occupied by someone rather than you, you should register a FIR in your local police station so that you can protect yourself from any legal action happens via misusing your number. And, the same FIR can be used to block your sim permanently by visiting to your telecom operator’s official store.


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