NEW DELHI: The TRAI updated its anti-spam guidelines on July 21, 2026, aimed at helping the public tackle the rising threat of unsolicited calls and SMS messages. Under the updated framework, users can utilize the official DND 2.0 application for better control over incoming communications or dial 1909 to block promotional messages. The initiative is designed to strengthen the digital privacy of millions of mobile subscribers.
Registering user preferences is the primary step toward achieving a spam-free mobile experience. Subscribers can choose to fully block all commercial communications or selectively allow categories essential to them, such as banking and healthcare. Telecom service portals have simplified the process of setting these preferences, significantly reducing frequent marketing calls and text messages.
How to report spam under TRAI DND guidelines
If spam calls continue despite setting preferences, users must report the violation within three days. Complaints can be filed by sending an SMS to 1909 containing the sender’s details and the date of the communication.
Telecom operators are required to investigate these complaints within a specified timeframe. Repeat offenders face heavy penalties or disconnection of their mobile services, ensuring greater accountability among marketing firms.
| Category | What Gets Blocked | Best Used For |
| Full DND | Blocks all commercial calls and SMS | Complete privacy |
| Partial DND | Allows selected messages (e.g., Banking) | Essential updates |
| Reporting | Use 1909 helpline or DND 2.0 app | Action against spam |
CNAP feature to display verified caller identity
A key focus of the updated guidelines is the Calling Name Presentation (CNAP) system. Unlike third-party applications, CNAP relies on verified subscriber data from telecom records to ensure that the name displayed on an incoming call screen is legally accurate.
While the feature is being rolled out in a phased manner, it promises to uncover the real identity of unknown callers, adding a stronger layer of security for every incoming call.
Alongside these measures, users are advised to stay vigilant against scams operating via WhatsApp or QR codes. Subscribers should never share OTPs with unknown individuals posing as officials. Those targeted by fraudulent activities should report the incident immediately on the national cyber crime portal. Regular reporting and awareness of telecom rules remain the most effective ways to maintain a safe digital ecosystem.
