Indias SIM Binding Rule: How It Will Change WhatsApp, Telegram

India is introducing a significant change to how messaging applications such as WhatsApp, Telegram, and Signal operate, potentially affecting millions of users. The governments Department of Telecommunications issued a directive on 28 November, requiring these apps to function only when an active SIM card is physically present in the users phone.

This initiative, termed SIM binding, aims to combat the rising wave of digital fraud, which cost India 22,800 crore rupees in 2024. Currently, messaging apps verify a SIM only during initial setup. The new rule changes this fundamental design, mandating continuous SIM presence for app functionality.

Additionally, web versions of these apps will require users to log out every six hours and re-link their devices using a QR code. App companies have 90 days to implement these changes and 120 days to submit compliance reports.

While telecom operators like Reliance Jio, Airtel, and Vodafone Idea, represented by the Cellular Operators Association of India, support the move, citing enhanced national security and traceability, big tech platforms express concerns.

The Broadband India Forum, which includes Meta and Google, argues the directive oversteps jurisdiction, could disrupt multi-device functionalities, and introduces new security risks. Users may soon find their messaging apps cease to work upon SIM removal or switching to Wi-Fi only, impacting secondary devices and work setups.