From March 1, users in India may no longer be able to access messaging apps such as WhatsApp and Telegram in the same way as before due to a new regulatory requirement known as “SIM binding”. Under directions issued by the Department of Telecommunications (DoT), communication platforms will function only if the mobile number’s SIM card is physically present and active in the device. This marks a sharp shift from the current system, where apps continue to operate across linked devices even if the SIM is removed. The government says the move is aimed at strengthening cybersecurity and preventing fraud.