- The WhatsApp Telegram SIM card rule is set to take effect from 1 January 2027.
- Users must register with a live SIM by 31 December 2026.
- WhatsApp and Telegram may stop working if the registered SIM is removed or deactivated.
The WhatsApp Telegram SIM card rule will change how people use messaging apps without a physical SIM in their phone. Under new guidelines issued by the Department of Telecommunications (DoT), WhatsApp and Telegram will stop working on a phone without the SIM card registered with the account from 1 January 2027.
Users need to complete account registration with a live SIM by 31 December 2026. The requirement will affect people who use these apps over Wi-Fi without the registered SIM inserted, as well as those who frequently switch SIM cards between devices.
WhatsApp Telegram SIM Card Rule: What Changes
From 1 January 2027, WhatsApp and Telegram will require the registered SIM to remain inserted in the phone for the apps to work. Using Wi-Fi alone without that SIM will no longer be enough under the new guidelines.
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What happens if the SIM is removed?
If the registered SIM is removed, replaced or deactivated, the messaging apps will stop working until a valid SIM is put back in the phone. Users who change SIM cards between devices will need to make sure the registered SIM is inserted in the phone where they use the app.
Who Will Be Affected by the New SIM Rule?
- People who use WhatsApp or Telegram over Wi-Fi without the registered SIM in their phone.
- Users who regularly move their SIM card between multiple devices.
- People whose registered SIM is removed, replaced or deactivated and who expect the apps to keep working.
Users who keep their registered SIM in the same phone where they use WhatsApp or Telegram should focus on completing registration with a live SIM before the deadline. For related information, see our guide to India’s inactive SIM deactivation rules.
Key Dates and Requirements
| Feature | Description |
|---|---|
| New rule starts | 1 January 2027 |
| Registration deadline | 31 December 2026 |
| SIM requirement | The SIM registered with the account must be inserted in the phone |
| If SIM is removed, replaced or deactivated | WhatsApp and Telegram stop working until a valid SIM is put back |
| Users most affected | People using the apps over Wi-Fi without the registered SIM, and people who switch SIMs between devices |
Why Has DoT Introduced This Rule?
The DoT says the requirement is intended to curb cyber fraud, phishing and digital arrest scams carried out from outside India using Indian mobile numbers. Keeping the registered SIM in the phone is meant to improve telecom cyber security.
What Should WhatsApp and Telegram Users Do?
- Complete registration with a live SIM by 31 December 2026.
- Keep the SIM registered with the account inserted in the phone where you use WhatsApp or Telegram.
- If you regularly switch SIM cards between devices, check that the registered SIM is in the device before using the apps.
Conclusion
The WhatsApp Telegram SIM card rule is scheduled to begin on 1 January 2027, with live-SIM registration required by 31 December 2026. Users who rely on Wi-Fi without the registered SIM or frequently switch SIM cards should prepare for the change to avoid losing access to WhatsApp and Telegram.
Frequently Asked Questions
When does the WhatsApp Telegram SIM card rule start?
The rule is set to take effect on 1 January 2027.
What is the deadline to register WhatsApp and Telegram with a live SIM?
Registration with a live SIM must be completed by 31 December 2026.
Will WhatsApp and Telegram work without the registered SIM?
No. From 1 January 2027, the apps will stop working if the registered SIM is not inserted in the phone.
Why is DoT introducing this SIM card requirement?
The DoT says the rule aims to curb cyber fraud, phishing and digital arrest scams using Indian mobile numbers from outside India, and improve telecom cyber security.
