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How to Block SIM Card using USSD Code

Learn how to destroy someone’s SIM card permanently. Just dial a USSD code (Unstructured Supplementary Service Data) to block sim card forever.



block sim card

Are you replacing your old number or want to block your SIM CARD forever? No problem! Here in this post, you will learn how to block SIM card permanently in India using a USSD code.

What is USSD? USSD stands for Unstructured Supplementary Service Data (learn more at Wikipedia page). It is a protocol which uses by GSM (Global System for Mobile Communication) cellular telephones to communicate with the service provider.

Also see: How to Find Own Mobile Number Details in India?

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 stop sim card permanently.

What is the USSD Code to Block Sim Card Permanently?

Look upon below USSD code that may help to block simcard forever.

Dial the following USSD code from 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.

Interesting fact: If you enter the wrong PIN code of your sim card more than 3 times, it will ask to enter the PUK code to reset the PIN. And, if you enter the wrong PUK code more than 10 times, it will also block your sim card forever.

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

The above secret code to block a 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: If you enter the wrong PUK code more than 10 times, it will block the SIM card permanently. After that, your sim will never reactivate in the future.

Contact Your Telecom Service Provider to Block SIM Card Temporarily

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

Get in touch with your telecom’s 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.

198 is a PAN-India number for registering complaints and requests only. Keep in mind that there is some daily call limitation to 198 for each Indian telecom operators, meaning you call may not get connected.

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

For more information, please call your telecom operator.

Alternatively, you can send email to your telecom operator and ask them to block your sim card.

Moreover, 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.

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  1. Elcidio Orlando

    Apr 1, 2017 at 1:14 AM

    Is there USSD code to unblock GPRS mobile data blocked sim card?

    • Lalit Sharma

      Apr 2, 2017 at 8:25 PM

      There is no such way (USSD code) to unblock GPRS data from the blocked sim card in order to enjoy free internet. 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.

  2. Rao

    Jun 25, 2017 at 6:49 PM

    How to block my sim permanently, if the sim is used by some others??

    • Lalit Sharma

      Jun 26, 2017 at 1:29 PM

      If your SIM card has occupied by someone rather than you, you should register an 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 your telecom operator’s official store.

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