SIM-Binding Rule for WhatsApp and Telegram: What Changes for You
India's new rule ties your WhatsApp or Telegram account to the SIM in your phone. Here is what it means, the December 31 deadline, and who should prepare now.
India's Department of Telecommunications (DoT) has ordered messaging apps that identify users by their mobile number to keep each account tied to an active SIM in the phone. The rule covers WhatsApp, Telegram, Signal, Snapchat and homegrown apps like Arattai, ShareChat, Josh and JioChat. Platforms have until 31 December 2026 to put it in place.
The goal is to stop accounts from working after the SIM behind them is removed, deactivated, or taken abroad, a gap the government says fraud networks have used to run scams anonymously.
Why the government is doing this
The DoT's directive amends the Telecommunications (Telecom Cyber Security) Rules, 2024. It says instant messaging and calling apps often keep working even after the SIM used to register them is pulled out, switched off, or moved overseas. That lets scammers buy a SIM, register an account, then run phishing calls, fake "digital arrest" threats, loan scams and investment fraud from numbers that are hard to trace back to a real person.
The same kind of SIM-binding and auto-logout rule already applies to UPI-linked payment apps, so this extends a similar idea to messaging and calling apps.
What actually changes
- The app needs an active SIM. Once enforced, the messaging app on your phone must be able to detect that the SIM linked to your account is still active in that device. If it isn't, the app can restrict or pause functionality until you re-verify.
- Web and desktop sessions log out periodically. Reports describe automatic logout roughly every six hours on web or desktop versions, after which you re-link by scanning a QR code with the phone that holds the SIM.
- Dual-SIM and eSIM users are fine, with one condition. If you use two SIMs, the one registered to your messaging account needs to stay active. An active eSIM should work the same way as a physical SIM.
- People who are affected most: anyone who registered WhatsApp or Telegram on a number, then removed that SIM and kept using the app over Wi-Fi only, or who keeps the registered SIM in a spare phone rather than their main one.
Which apps are in scope
The DoT's order applies to what it calls "telecommunication identifier user entities" — apps that use an Indian mobile number to uniquely identify a user. Government-cited examples include WhatsApp, Telegram, Signal, Snapchat, Arattai, ShareChat, Josh and JioChat. Reporting on the final list is not fully consistent: some coverage says Signal and Snapchat's compliance status is still unclear because the companies did not respond to government outreach. Treat the exact app list as provisional until each platform confirms its own rollout.
Timeline so far
- December 2025: DoT issued the original directive, giving platforms 90 days to comply and 120 days to report compliance.
- Early 2026: The initial deadline (reported as late February) was pushed back after messaging platforms and industry bodies asked for more time to make the technical changes.
- Current deadline: 31 December 2026, with the rule expected to be enforced from 1 January 2027.
What this means for you, practically
Keep your registered SIM active
If WhatsApp or Telegram is tied to a number you rarely use, make sure that SIM stays switched on and in a phone you can access.
Know your re-verification method
If you use the web or desktop app for work, expect to scan a QR code with your phone periodically rather than staying logged in indefinitely.
Update your number the proper way
If you plan to drop a SIM, change your registered number in the app's settings first, instead of just removing the SIM and hoping the app keeps working.
What most people miss
- This is not an India-wide shutdown of WhatsApp or Telegram. It only affects accounts where the SIM behind the number is gone.
- It will not stop scams that don't rely on SIM swapping, such as someone tricking you into sharing an OTP yourself. Pair this with basic habits from checking links and senders carefully.
- Businesses that use a shared or "SIM-less" number for official WhatsApp accounts should check with their provider now, since this is the group most likely to see disruption first.
- The rule mirrors something banking apps already do. If your UPI app has ever logged you out after a SIM change, this is the same logic applied to chat apps.
