Summary: India’s Department of Telecommunications (DoT) will enforce a SIM binding mandate for messaging apps. And it takes effect on January 1, 2027. Under the Telecom Cyber Security Rules, apps like WhatsApp, Telegram and Signal will be required to link accounts to KYC-verified SIM cards.
India’s Department of Telecommunications (DoT) will enforce SIM binding for messaging apps starting January 1, 2027. Under the Telecom Cyber Security Rules, platforms like WhatsApp, Telegram, and others must link accounts to KYC-verified SIM cards present in the user’s device.
What SIM Binding Means
The DoT set December 31, 2026, as the deadline for messaging platforms. Starting January 1, 2027, apps must ensure that each account is linked to the SIM card registered to it. With the SIM physically present in the user’s device. The directive is aimed at curbing cyber fraud by tightening the link between messaging accounts and verified users.
The rule covers WhatsApp, Telegram, Signal, Snapchat, Arattai, ShareChat, Josh and JioChat. WhatsApp has reportedly begun beta testing SIM binding on Android.
An earlier version of the rules required web sessions to auto-logout every 6 hours. That has been replaced by risk-based logouts, where services may be terminated immediately in suspected fraud cases.
Who Could Be Affected
The mandate could disrupt access for several categories of users. Those who run WhatsApp or Telegram over Wi-Fi without the registered SIM in their device may face restrictions. Tablet and secondary phone owners who rely on linked accounts without the original SIM could also be impacted.
Travelers who frequently switch SIM cards may need to verify their account setup after the rules take effect. WhatsApp Web and other linked device users could be required to reconnect their sessions. WhatsApp has already blocked logins on outdated software earlier this year. So, SIM binding adds another layer of access requirements for users in India.
