What Is ASTR and How Does It Verify SIM Subscribers Using AI?

In today’s hyper-connected world, where mobile phones are as essential as wallets, the rise of cybercrime has become a pressing concern. Fraudsters often exploit mobile connections, using fake identities to obtain SIM cards for scams like phishing, sextortion, and financial fraud. To tackle this, the Indian government introduced ASTR—Artificial Intelligence and Facial Recognition Powered Solution for Telecom SIM Subscriber Verification. Developed by the Department of Telecommunications (DoT) and the Centre for Development of Telematics (C-DOT), ASTR is a game-changing tool that uses artificial intelligence (AI) to verify SIM subscribers and curb fraudulent activities. In this blog, we’ll dive into what ASTR is, how it works, and why it’s a critical step toward a safer telecom ecosystem in India.

Sep 10, 2025 - 16:35
Sep 12, 2025 - 15:34
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What Is ASTR and How Does It Verify SIM Subscribers Using AI?

Table of Contents

What is ASTR?

ASTR stands for Artificial Intelligence and Facial Recognition Powered Solution for Telecom SIM Subscriber Verification. It’s an innovative tool developed by the DoT and C-DOT to detect and block fraudulent mobile connections in India. Launched in 2021 as a pilot in Haryana’s Mewat region, ASTR uses AI and facial recognition to verify subscriber identities by analyzing photos and data provided during SIM registration. By identifying fake or duplicate SIMs, ASTR helps prevent cybercrimes, which have surged in India, with over 67 lakh fraudulent connections detected from 134 crore analyzed by mid-2023.

https://www.cdot.in/cdotweb/web/product_page.php?lang=en&catId=4&pId=67 

The tool ensures that only legitimate subscribers, adhering to the DoT’s limit of nine SIMs per person, remain active in the telecom network, creating a more secure digital environment.

Why Was ASTR Developed?

With India boasting over 117 crore mobile subscribers, it’s the world’s second-largest telecom market. However, this vast network is a prime target for cybercriminals who use fake SIMs to commit fraud. In 2022 alone, cybercrimes cost Indians billions, with scams often linked to SIMs registered using forged documents. Traditional verification methods, relying on manual checks of IDs and addresses, are slow and prone to errors. ASTR was developed to:

  • Detect SIMs registered with fake or forged identities.
  • Enforce the DoT’s nine-SIM limit per individual.
  • Reduce cybercrimes like financial fraud and extortion.
  • Support law enforcement in tracking criminals using fraudulent SIMs.

By leveraging AI, ASTR addresses these challenges efficiently, making it a vital tool for India’s telecom security.

https://www.thehindu.com/sci-tech/technology/will-facial-recognition-ai-help-detect-telecom-fraud/article66901902.ece 

How Does ASTR Verify SIM Subscribers?

ASTR uses a sophisticated process to verify SIM subscribers and identify fraudulent connections. Here’s how it works in simple terms:

  • Data Collection: Telecom operators share subscriber data, including photos from Customer Acquisition Forms (CAFs), with the DoT, as mandated in 2012.

https://indianexpress.com/article/explained/explained-sci-tech/govt-ai-face-recognition-tool-astr-detect-phone-frauds-8614162

     
  • Facial Recognition: ASTR scans these photos, comparing each face against the entire database to find matches, even if registered under different names.
  • Name Matching: It uses fuzzy logic to identify similar names (e.g., “Ravi Kumar” vs. “Ravi K.”) despite typos or variations.
  • Fraud Detection: The system flags accounts with more than nine SIMs or those using the same photo under multiple identities.
  • Action: Suspicious SIMs are reported to telecom operators for verification and disconnection, with details shared with banks and social media platforms to prevent further misuse.

ASTR’s speed is remarkable—it can analyze 1 crore images in under 10 seconds, making it highly effective for large-scale verification.

https://indianexpress.com/article/explained/explained-sci-tech/govt-ai-face-recognition-tool-astr-detect-phone-frauds-8614162 

AI Techniques Behind ASTR

ASTR relies on advanced AI and machine learning to achieve its goals. Here are the key techniques it uses:

    • Convolutional Neural Networks (CNNs): These are AI models that encode facial features from photos, accounting for variations like tilt, lighting, or image quality.

https://indianexpress.com/article/explained/explained-sci-tech/govt-ai-face-recognition-tool-astr-detect-phone-frauds-8614162

    • Facial Recognition: ASTR compares faces with 97.5% accuracy, grouping similar ones to detect duplicates.

https://indianexpress.com/article/explained/explained-sci-tech/govt-ai-face-recognition-tool-astr-detect-phone-frauds-8614162

       
    • Fuzzy Logic: This technique identifies approximate matches in names, catching fraudsters who use slight variations to register SIMs.

https://vajiramandravi.com/upsc-daily-current-affairs/mains-articles/astr-ai-facial-recognition-based-tool-to-detect-phone-frauds

       
    • Data Analytics: ASTR analyzes patterns in subscriber data to flag suspicious activity, such as multiple SIMs linked to one photo.

https://www.cdac.in/index.aspx?id=pk_itn_spot13339

    These technologies enable ASTR to process massive datasets quickly, ensuring scalability across India’s vast telecom network.

Comparison: ASTR vs. Traditional Verification

Traditional SIM verification methods rely on manual checks, which are slow and error-prone. ASTR revolutionizes this process. Here’s a comparison:

Feature ASTR Traditional verification
Method AI and facial recognition Manual document checks
Speed Analyzes 1 crore images in 10 seconds Days or weeks for large datasets
Accuracy 97.5% facial match accuracy Prone to human error
Scalability Handles 134 crore connections Limited by manpower
Fraud Detection Detects duplicate faces and names Limited to text-based checks

Benefits of ASTR

ASTR offers significant advantages for India’s telecom ecosystem:

    • Fraud Reduction: It has detected 67 lakh fraudulent SIMs, with 59 lakh disconnected, curbing cybercrimes.

https://www.cdot.in/cdotweb/web/product_page.php?lang=en&catId=4&pId=67

       
    • Speed and Efficiency: Processes massive datasets quickly, enabling rapid action against fraud.
    • Enhanced Security: Helps banks and social media platforms block accounts linked to fake SIMs.
    • Support for Law Enforcement: Identifies criminals and blacklists Points of Sale (PoS) involved in fraud.

https://www.cdot.in/cdotweb/web/product_page.php?lang=en&catId=4&pId=67

       
    • Public Safety: Used in non-telecom cases, like identifying bodies in the 2023 Balasore train accident.

https://www.cdot.in/cdotweb/web/product_page.php?lang=en&catId=4&pId=67

     

Challenges in Implementing ASTR

Despite its success, ASTR faces challenges:

    • Privacy Concerns: Subscribers are not informed about facial data processing, raising privacy issues.

https://www.medianama.com/2023/02/223-govt-confirms-using-facial-recognition-on-sim-card-subscribers-2

       
    • Data Accuracy: Aging or poor-quality photos can lead to false negatives, as seen in a Delhi case where a subscriber’s aged face wasn’t recognized.

https://www.medianama.com/2023/12/223-dot-removes-55-lakh-suspected-connections

       
    • Data Retention: Lack of clarity on how long subscriber data is stored, with potential retention for 75 years under the Criminal Procedure (Identification) Act.

https://www.medianama.com/2023/01/223-explained-astr-sim-facial-recognition-2

       
    • Consent Issues: The absence of a data protection law raises questions about processing without consent.

https://www.thehindu.com/sci-tech/technology/will-facial-recognition-ai-help-detect-telecom-fraud/article66901902.ece

     

Addressing these concerns is crucial for public trust and legal compliance.

The Future of ASTR

ASTR is expanding beyond its pilot phase, with deployments in states like Haryana, Gujarat, and Tamil Nadu. Future developments may include:

  • Integration with digital KYC norms to reduce the nine-SIM limit to five.

https://indianexpress.com/article/business/economy/kyc-verification-for-sim-cards-to-soon-go-fully-digital-8544969

  • Enhanced algorithms to handle aging faces and low-quality images.
  • Collaboration with global telecom regulators for cross-border fraud prevention.
  • Public awareness campaigns to address privacy concerns and clarify data usage.

As cybercrimes evolve, ASTR’s scalability and adaptability will make it a cornerstone of India’s cybersecurity strategy.

Conclusion

ASTR is a groundbreaking tool that harnesses AI and facial recognition to combat SIM-based fraud in India’s massive telecom network. By detecting fake SIMs, enforcing regulations, and supporting law enforcement, it significantly reduces cybercrime risks. Its use of convolutional neural networks and fuzzy logic ensures speed and accuracy, far surpassing traditional methods. However, challenges like privacy concerns and data accuracy must be addressed to maintain public trust. As ASTR expands, it promises to strengthen India’s digital ecosystem, making mobile connections safer for millions of users.

Frequently Asked Questions

What is ASTR?

ASTR is an AI and facial recognition tool developed by the DoT and C-DOT to verify SIM subscribers and detect fraudulent mobile connections.

What does ASTR stand for?

It stands for Artificial Intelligence and Facial Recognition Powered Solution for Telecom SIM Subscriber Verification.

Why was ASTR created?

To combat cybercrimes by identifying and blocking SIMs registered with fake or forged identities.

How does ASTR verify subscribers?

It uses facial recognition to compare subscriber photos and fuzzy logic to match names, flagging duplicates or excessive SIMs.

What is facial recognition in ASTR?

It’s an AI technique that compares faces in photos to find matches, even if registered under different names.

What are convolutional neural networks (CNNs)?

CNNs are AI models that analyze images to identify facial features, accounting for variations like lighting or angles.

What is fuzzy logic in ASTR?

It’s a method to find approximate matches in names, catching typos or variations used by fraudsters.

How many SIMs can one person have?

The DoT allows up to nine SIMs per person using a single identity proof.

How many fraudulent SIMs has ASTR detected?

Over 67 lakh suspicious connections, with 59 lakh disconnected as of mid-2023.

https://www.cdot.in/cdotweb/web/product_page.php?lang=en&catId=4&pId=67 

Which states have used ASTR?

Haryana, Gujarat, Tamil Nadu, West Bengal, Bihar, and others have deployed ASTR.

https://www.thehindu.com/sci-tech/technology/will-facial-recognition-ai-help-detect-telecom-fraud/article66901902.ece 

How fast is ASTR?

It can analyze 1 crore images in under 10 seconds.

https://indianexpress.com/article/explained/explained-sci-tech/govt-ai-face-recognition-tool-astr-detect-phone-frauds-8614162 

Does ASTR help law enforcement?

Yes, it identifies criminals and blacklists Points of Sale involved in issuing fake SIMs.

https://www.cdot.in/cdotweb/web/product_page.php?lang=en&catId=4&pId=67 

What happens to fraudulent SIMs?

They are reported to telecom operators for disconnection after verification.

https://indianexpress.com/article/explained/explained-sci-tech/govt-ai-face-recognition-tool-astr-detect-phone-frauds-8614162 

Does ASTR share data with others?

Yes, with banks, payment wallets, and social media platforms to block linked accounts.

https://www.gktoday.in/artificial-intelligence-and-facial-recognition-powered-solution-for-telecom-sim-subscriber-verification-astr 

Are there privacy concerns with ASTR?

Yes, subscribers aren’t informed about data processing, raising privacy issues.

https://www.medianama.com/2023/02/223-govt-confirms-using-facial-recognition-on-sim-card-subscribers-2 

How long is subscriber data stored?

It’s unclear, but data from suspects may be retained for 75 years under the Criminal Procedure (Identification) Act.

https://www.medianama.com/2023/01/223-explained-astr-sim-facial-recognition-2 

Can ASTR make mistakes?

Yes, aging faces or poor-quality photos can lead to false negatives.

https://www.medianama.com/2023/12/223-dot-removes-55-lakh-suspected-connections 

Is ASTR used only for SIM verification?

No, it’s also helped identify bodies in incidents like the 2023 Balasore train accident.

https://www.cdot.in/cdotweb/web/product_page.php?lang=en&catId=4&pId=67 

Will ASTR’s SIM limit change? 

The DoT plans to reduce the limit to five SIMs per person.

https://indianexpress.com/article/business/economy/kyc-verification-for-sim-cards-to-soon-go-fully-digital-8544969 

What’s the future of ASTR?

It may improve algorithms, expand nationwide, and integrate with global fraud prevention efforts.

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Ishwar Singh Sisodiya I am focused on making a positive difference and helping businesses and people grow. I believe in the power of hard work, continuous learning, and finding creative ways to solve problems. My goal is to lead projects that help others succeed, while always staying up to date with the latest trends. I am dedicated to creating opportunities for growth and helping others reach their full potential.