India’s leading telecom companies are accelerating the rollout of Caller Name Presentation (CNAP) as authorities warn that a growing wave of “silent calls” is being used as a gateway for fraud and financial scams. The move signals a shift in how regulators and operators are attempting to restore trust in voice calls, which have increasingly become a tool for low-tech but highly effective cybercrime.

Silent Calls: A Quiet Tool for Fraud

India’s Department of Telecommunications (DoT) recently issued a public advisory clarifying that silent calls—where a phone rings and no voice is heard after answering—are not technical glitches. Instead, officials say they are often deliberate attempts by fraudsters to verify whether a number is active.

Once a call is answered, even without conversation, the number can be marked as “live” and sold or reused by scam networks. These verified numbers may later be targeted for phishing calls, impersonation scams, or more sophisticated social-engineering attacks.

To counter this, the DoT has urged citizens to block silent callers immediately and report them via the government’s Sanchar Saathi portal, which aggregates user reports to identify patterns of telecom abuse.

CNAP: Putting Verified Names to Phone Numbers

In response to rising fraud, telecom operators are introducing Caller Name Presentation (CNAP), a system that displays the registered name of the caller on the recipient’s screen.

Reliance Jio has taken the lead by rolling out CNAP across multiple regions. Unlike third-party caller ID apps that rely on crowdsourced labels, CNAP uses subscriber information collected during SIM registration, which is verified against official identity documents.

Supporters say this adds a layer of accountability to phone calls, making it harder for scammers to hide behind anonymous numbers and easier for users to decide whether to answer a call.

Nationwide Push to Standardise Caller Identity

The Telecom Regulatory Authority of India (TRAI) has directed all major operators to implement CNAP, aiming to make it a national standard rather than a fragmented, operator-specific feature.

Current rollout status includes:

• Reliance Jio: Live in several regions, including West Bengal, Kerala, Bihar, Rajasthan, Odisha, and parts of northern and southern India
• Airtel: Active in select circles such as West Bengal, Gujarat, and Madhya Pradesh
• Vodafone-Idea (Vi): Limited rollout in Maharashtra, with pilot testing in Tamil Nadu
• BSNL: CNAP remains in trial phases

Industry sources note that deployment is technically demanding, requiring upgrades to legacy switching systems and seamless coordination across competing networks.

Balancing Fraud Prevention and Privacy

While CNAP is positioned as an anti-scam measure, it has also revived concerns over privacy, data accuracy, and potential misuse of subscriber information. Experts caution that verified caller names are only as reliable as the data behind them, and determined criminals may still obtain SIM cards using false or proxy identities.

Regulators acknowledge these risks, emphasizing that CNAP is meant to complement—not replace—other safeguards such as spam call filtering, bulk caller identification, and stricter telemarketing regulations.

A Changing Reality for Phone Calls

The rise of silent calls alongside verified caller identity reflects a broader shift: phone calls are no longer inherently trustworthy. Fraudsters exploit anonymity and human reflexes, while authorities respond with transparency and traceability.

For consumers, the guidance remains cautious. Silent calls should be treated as red flags, and displayed caller names should be viewed as helpful indicators, not guarantees. In a country handling billions of calls daily, even incremental changes in how calls are identified and answered could significantly reduce exposure to scams.