New restrictions have been introduced on the use of messaging apps such as WhatsApp, Telegram and Signal, as authorities move to curb their misuse by cybercriminals. The changes include a SIM-linked usage rule and automatic logouts on computer-based versions.

Officials say cyber fraud has been rising, with people losing large sums to online scams. In 2025 alone, losses of Rs 644 crore were reported from frauds such as so-called “digital arrest” scams.

Investigations found a recurring pattern: offenders activate these apps using one-time passwords, then discard the SIM used for login—often while operating from abroad—making tracing difficult. To address this, the Department of Telecommunications has directed implementation of a “SIM binding” rule, under which the app must remain tied to the SIM number used for registration.

Under the rule, if the SIM is removed from the phone, the apps will be disabled even if the device has Wi-Fi connectivity. In addition, web versions logged in on computers will automatically log out every six hours, requiring users to re-authenticate by scanning a QR code from the phone.

The measures have been in effect since March 1. Users have flagged problems, including difficulties for Indian travellers abroad using roaming SIMs and disruption for professionals who rely on the web version for work. Technology experts said the rules were introduced without consultations with industry bodies, and companies may submit reports to the government, potentially leading to revisions.