How to Check SIM Registration with Your CNIC In 2023

In recent years, mobile technology has seen rapid growth and widespread adoption, transforming the way we communicate. One crucial aspect of this technology that often goes unnoticed is the Subscriber Identity Module (SIM) card.

These small chips are a vital part of mobile communication, enabling us to connect with others worldwide. But, as with any technology, it’s essential to ensure the correct usage and registration of SIM cards. This blog post aims to provide a comprehensive guide on how to verify unauthorized use of your ID number in SIM card registration, why it’s important, and what steps you can take to protect yourself.

SIM Card Registration

SIM card registration is a process through which a mobile network associates a particular SIM card with the identity of the user. This association is usually done using the user’s national identity card or any other valid government-issued identification. In Pakistan, for instance, the PTA requires every SIM card user to register their SIM card using their Computerized National Identity Card (CNIC)[3].

IMSI (International Mobile Subscriber Identity) in SIM Card Registration

The International Mobile Subscriber Identity (IMSI) plays a crucial role in SIM card registration. The IMSI is a unique number associated with every SIM card, enabling mobile networks to identify and authenticate subscribers.

When you register your SIM card, your IMSI is linked with your personal identification information stored in the network’s database. This linkage allows the network to recognize you as the authorized user of that SIM card.

How to Check SIM Registration with Your ID Card Online

Visit the Official Site

The first step in verifying your SIM registration is to visit the official website of your mobile network operator or a relevant government agency like PTA. These websites typically have online portals where users can check the status of their SIM registration.

Inputting your Mobile Number

Once you’re on the website, look for an option that allows you to check your SIM registration status. This option will typically require you to input your mobile number. Ensure you enter it correctly, including the country and area codes if necessary.

Verifying OTP

After inputting your mobile number, you’ll usually receive a One-Time Password (OTP) on your phone. Enter this OTP on the website to verify that you’re indeed the owner of the SIM card associated with the mobile number you provided.

Receiving Confirmation of Registration

Once you’ve verified the OTP, the website will provide you with the registration status of your SIM card. If your SIM card is registered, it will display the ID number it’s registered under. Ensure this ID number matches your own to confirm that your SIM card isn’t registered under someone else’s ID number.

Checking for Unauthorized SIMs on Your ID Card

Using SMS Services to Check SIM Registration

Alternatively, you can use SMS services provided by various mobile network operators to check for unauthorized SIMs registered under your ID. For example, in Pakistan, you can send an SMS with your CNIC number (without hyphens) to 668. You’ll receive a reply with the number of active SIMs registered under your CNIC along with their operator names[4].

Use Online Platforms to Check Number of SIMs on ID Card

Another way to check the number of SIMs registered on your ID card is through online platforms like the PTA’s SIM Information System. These websites allow you to enter your ID number and provide you with a list of all SIM cards registered under it. If you find any SIM cards that you didn’t register, you should immediately report them to your mobile network operator or the PTA[5].

Postpaid Account Holders

Understanding End-Users Obligations

As a postpaid account holder, you have certain obligations to ensure the correct usage of your SIM card. These include promptly reporting any changes in your personal information to your mobile network operator, regularly checking your SIM registration status, and immediately reporting any unauthorized SIMs found under your ID.

Report Changes in Information to the Telco

If there are any changes in your personal information, such as a change in address or name, you should promptly report these changes to your mobile network operator. This reporting will help ensurethat your SIM card registration information is up to date and accurate, reducing the risk of unauthorized usage.

Rules Regarding Selling or Donating the SIM

If you plan to sell or donate your SIM card, ensure that you follow the correct procedures. This process usually involves contacting your mobile network operator to deactivate your SIM card before transferring it to someone else. Additionally, the new user should register the SIM card under their ID immediately upon receiving it. Failure to follow these procedures can result in unauthorized usage of your SIM card and potential legal consequences[7].


Verifying the use of your ID number in SIM card registration is crucial to prevent identity theft and unauthorized usage. You can check your SIM registration status online through the official websites of mobile network operators or relevant government agencies like PTA.

Additionally, you can use SMS services to check the number of SIMs registered under your ID. If you find any unauthorized SIMs, report them immediately to your mobile network operator or the PTA.

Kazim Ali

Our resident Kazim Ali, deciphers the latest industry trends and innovations, delivering expert insights in easy-to-digest articles.

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