SIM-Binding Rule from January 1, 2027: What WhatsApp and Other Messaging Apps Users Need to Know

If you use WhatsApp, Telegram or similar messaging apps with an Indian mobile number but don’t keep the registered SIM in your phone, changes coming into force from January 1, 2027 could affect your access.

The Department of Telecommunications (DoT) has fixed December 31, 2026 as the deadline for messaging platforms to implement SIM-binding requirements. The move is aimed at curbing cyber fraud and the misuse of Indian mobile numbers.

From next year, apps that register users through Indian phone numbers will have to verify that the registered number is linked to an active SIM or eSIM present on the device. In simple terms, you may no longer be able to keep using an account indefinitely after removing, deactivating or replacing the original SIM.

If the linked SIM is taken out or becomes inactive, the app could suspend the account until the same number is restored via a valid SIM or eSIM. The government’s push is part of a broader effort to tackle cybercrime, phishing and “digital arrest” scams. Fraud networks have been known to buy Indian SIMs, create messaging accounts and then operate them from abroad. Tighter linkage between accounts and active SIMs is expected to make such cross-border misuse harder.

Large financial losses suffered by Indian consumers due to cyber fraud have also been cited as a key reason for the tighter rules.

WhatsApp and Telegram are among the platforms expected to come under the new requirements because they rely on phone numbers for registration. Snapchat is reportedly not covered, while Signal’s position remains unclear as it had not responded to government communications at the time of review.

There is no indication that WhatsApp will stop working on specific iPhone or Android models. The restrictions relate to SIM verification and account authentication, not to device brands or operating systems.

Users most likely to be affected include those who keep the registered SIM in a secondary phone while using WhatsApp on another device, those who remove the SIM after setting up the account, and those who rely mainly on Wi-Fi. Dual-SIM users will also need to ensure the number linked to their messaging account stays active.

The rules will apply to both physical SIMs and eSIMs. As long as the registered number is tied to an active eSIM on the device, users should not face problems simply because they are not using a physical SIM card.