SIM Binding

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News: The Department of Telecommunications has recently directed major app-based communication services to implement SIM binding to curb cyber-frauds and misuse.

About SIM Binding

SIM Binding
Source – ET
  • SIM binding is a security process that links a user’s messaging or communication app to the specific SIM card used during registration.
  • Authorized under: The Department of Telecommunications (DoT) has issued these directions under the Telecommunication Cybersecurity Amendment Rules, 2025.
    • Under the Rules, the DoT has introduced the concept of Telecommunication Identifier User Entity (TIUE).
      • TIUE is a non-licence entity that uses telecommunication identifiers such as mobile numbers to identify and serve its users.
  • Working mechanism
    • liSIM binding nks the app to the SIM used during registration and continuously checks the same SIM identifiers stored in it.
    • If the identifiers in the device do not match those recorded at registration, the app treats it as an identity mismatch and blocks access.
  • Key features
    • The app works only when the registered SIM is present and active in the handset.
    • Web or desktop instances must be logged out periodically, not later than six hours, with re-linking through a QR code.
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