WhatsApp and Telegram users in India may need to keep the SIM card linked to their accounts inside their smartphones from January 1, 2027. The Department of Telecommunications (DoT) has directed messaging platforms to implement mandatory SIM binding by December 31, 2026. The measure aims to prevent cybercriminals from operating messaging accounts using Indian mobile numbers after removing or relocating the registered SIM cards.
What Is SIM Binding?
SIM binding is a security mechanism that continuously links a messaging application to the active SIM card associated with the mobile number used to register the account.
Currently, users can often continue using WhatsApp after removing the registered SIM, provided the account remains active and the device has an internet connection. Under the new requirement, affected applications must verify that the corresponding active SIM remains present in the device.
For example, someone who registered WhatsApp using a particular Jio or Airtel number may need to keep that SIM in the phone to continue using the service. Removing or deactivating it could interrupt access.
Which Apps Will Be Affected?
The original DoT directions covered several communication platforms, including WhatsApp, Telegram, Signal, Snapchat, ShareChat, Arattai, JioChat and Josh. The precise implementation and compliance status may differ between platforms, so users should watch for official announcements from individual services.
The requirements apply to services using Indian mobile numbers to identify users or provide communication services.
Why Is the Government Introducing This Rule?
The government says criminals have exploited messaging accounts that continue functioning even after their registered SIM cards are removed or moved elsewhere. Such accounts can be operated remotely, complicating investigations into online scams.
SIM binding is intended to improve traceability and reduce the misuse of Indian mobile numbers in phishing, investment fraud, impersonation and so-called digital arrest scams.
However, the measure has also raised concerns among technology companies about implementation challenges, user convenience and compatibility across different operating systems.
What Happens to WhatsApp Web and Desktop?
The government initially proposed automatically logging users out of web and desktop sessions every six hours. However, that requirement was subsequently relaxed. According to reports, platforms are instead expected to terminate sessions based on risk analysis, particularly when suspicious activity is detected.
Users should therefore not assume that every WhatsApp Web session will automatically end every six hours under the latest arrangement.
How Will the Rule Affect Everyday Users?
People who keep their registered SIM cards in their primary smartphones may experience little change. However, users who remove SIM cards, switch between devices or rely on secondary phones could face interruptions.
Travellers using local SIM cards abroad and people who use messaging services on multiple devices may also need to check how their apps handle the new requirements.
With the December 31, 2026, compliance deadline approaching, users should watch for official updates from the DoT and their messaging platforms before making changes to their devices.
Summary
India’s SIM-binding requirements are expected to affect WhatsApp, Telegram and other messaging services from January 1, 2027. Users may need to keep the active SIM associated with their registered mobile number in their smartphones. The government says the measure will help combat cyber fraud, while web-session controls have shifted towards risk-based logouts rather than a mandatory six-hour cycle.
