Two major changes are coming for mobile phone users in India. From November 1, 2026, incoming calls on supported 4G and newer networks are expected to display the caller’s name. From January 1, 2027, messaging apps covered by the government’s SIM-binding directions may require the registered, active SIM to remain in the device running the app.
1. What changes from November 1?
The Department of Telecommunications (DoT) has directed telecom operators to introduce Calling Name Presentation (CNAP). If a number is saved in your contacts, your saved name will appear. If it is not saved, the name recorded in the caller’s telecom subscriber database may be displayed. Unsaved international calls will show “International Call”.
The service is intended to work automatically, without a separate request. The initial rollout covers 4G and newer wireless networks; 2G, 3G and landline services will be considered separately.
2. What is SIM binding?
Under the SIM-binding requirements, apps linked to an Indian mobile number must keep the account connected to the active SIM associated with that number. Covered services include WhatsApp, Telegram, Signal, ShareChat, Josh, JioChat, Arattai and Snapchat, although implementation may vary by platform.
If the registered SIM is removed, deactivated or unavailable in the device running the app, access could be disrupted. The measure aims to prevent cyber fraud and misuse of mobile numbers. The compliance deadline is December 31, 2026.
3. What should users do?
If you use WhatsApp on a second phone or Wi-Fi-only tablet, check how the app implements the requirement. People travelling abroad should plan before removing their Indian SIM or switching numbers. Dual-SIM users should keep the registered number active and follow official app guidance.
WhatsApp Web and desktop sessions will not have a fixed six-hour logout rule; logouts are expected to follow risk-based checks. Users should watch for further official updates before making changes to their devices.
