Mar 6, 2026
SIM-Binding Rule to Change How WhatsApp and Telegram Work in India from March 1st
India’s new SIM-binding rule effective March 1 will change how WhatsApp and Telegram operate. Learn what this regulation means for messaging apps, user privacy, and digital security.
India is enforcing a new SIM-binding rule starting on March 1, 2026. This rule fundamentally changes how popular messaging apps like WhatsApp, Telegram, and Signal work, especially when used on multiple devices and web clients.
The new Telecom Cyber Security Rules say that these apps must always check that the original, KYC-verified SIM used to sign up is still in the main device and working. If the SIM is taken out, switched, or turned off, the app must stop working, even over Wi-Fi.
The Department of Telecommunications’ AI & Digital Intelligence Unit ordered major messaging platforms in November to implement SIM binding within 90 days, with non‑compliance exposing providers to legal action under the Telecommunications Act 2023 and the Telecom Cyber Security Rules. A key operational change is mandatory six‑hour auto‑logout for services like WhatsApp Web and Telegram Web, forcing users to periodically re‑link sessions via their SIM‑bound primary phone, significantly constraining always‑on multi‑device workflows.
The government argues the move is “the need of the day,” citing cyber‑fraud losses and the widespread misuse of over‑the‑top messaging accounts for phishing, loan scams, and “digital arrest” schemes, while industry groups question whether such deep technical mandates exceed DoT’s statutory powers and create new privacy and competition concerns.
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