A new warning from India’s telecom authorities has cast fresh light on how everyday phone calls are being quietly weaponised by fraudsters — and how a long-debated identity system for callers is now being positioned as part of the response.
When a Ring Carries No Voice
For many mobile users, the experience is familiar: a phone rings, the call is answered, and there is only silence. According to the Department of Telecommunications (DoT), these so-called “silent calls” are not network errors or momentary glitches. They are deliberate probes.
Officials say the calls are used to confirm whether a phone number is active. Once a call is answered — even if no one speaks — the number can be tagged as live, increasing its value to scam networks. From there, it may be fed into databases used for phishing attempts, social-engineering calls or more elaborate financial frauds.
The DoT has urged users to block such numbers immediately and report them through the government’s Sanchar Saathi portal, part of a broader effort to crowdsource intelligence on telecom misuse. The warning reflects a growing concern inside the government that fraud has become increasingly low-tech at its point of entry, relying not on malware or hacking, but on human behaviour and habit.
The Push to Put Names to Numbers
Against this backdrop, India’s telecom system is undergoing a quiet but consequential shift. Reliance Jio has begun rolling out Caller Name Presentation, or CNAP, a feature that displays the caller’s registered name on the recipient’s phone screen.
Unlike crowd-sourced caller-ID apps, which rely on user-generated labels and shared contact lists, CNAP draws on information submitted to telecom operators at the time of SIM registration. That data, officials say, is verified against documents, making it more difficult to manipulate at scale.
Proponents argue that the change restores a basic form of trust to voice calls, which have become one of the weakest links in the digital ecosystem. If users can see a verified name attached to a number, the thinking goes, they are less likely to engage with anonymous or spoofed callers.
Yet the move also reopens long-running debates about privacy, data accuracy and the potential misuse of subscriber information — concerns that regulators and operators have sought to address through phased implementation.
Regulators and the Race to Standardise
The Telecom Regulatory Authority of India (TRAI) has directed other major operators — including Airtel, Vodafone-Idea (Vi) and BSNL — to introduce CNAP as well, setting the stage for a nationwide standard rather than a single-operator feature.
Implementation, however, is uneven. Jio’s service is already live across large parts of eastern, northern and southern India, including West Bengal, Kerala, Bihar, Rajasthan and Odisha. Airtel has launched CNAP in select circles such as West Bengal, Gujarat and Madhya Pradesh. Vodafone-Idea’s rollout is currently concentrated in Maharashtra, with limited testing underway in Tamil Nadu, while BSNL is still running pilot trials.
Telecom executives privately describe the rollout as technically complex, requiring changes to legacy switching systems and coordination across networks. Regulators, for their part, see CNAP as complementary to other anti-spam measures, including call-scrubbing, bulk-caller identification and stricter rules for telemarketers.
A Fragile Line Between Safety and Surveillance
The parallel rise of silent calls and verified caller names underscores a larger reality: the phone call, once considered a trusted medium, has become contested terrain. Fraudsters exploit anonymity and scale; regulators respond with identity and traceability.
Whether CNAP meaningfully reduces scams remains an open question. Experts note that determined criminals can still obtain SIM cards under false identities, and that trust in displayed names will depend heavily on data hygiene and enforcement.
For now, the government’s message is pragmatic rather than absolute. Silent calls should be treated as warning signs, not curiosities. Caller identity, where available, should be read cautiously, not blindly. In a system handling billions of calls a day, even small shifts in how people answer the phone can reshape the balance between vulnerability and vigilance.
