SIM-binding for WhatsApp and Telegram: what actually changes for you

Last checked11 Oct 2026

Next check11 Nov 2026

Read from4 sources

In one line

Messaging apps will have to work only while the SIM for your number is in your phone. The rule is real but not fully switched on: apps have until 31 December 2026 to report compliance, and the six-hour WhatsApp Web logout was dropped.2

Does this apply to you?

Find yourself in the list.

Your WhatsApp number's SIM is in your phone

No change

You may see a one-time prompt asking WhatsApp to check the phone number on your SIM. Allow it inside the app and carry on.3

You use WhatsApp Web or the desktop app

No change

The plan to log everyone out every six hours was dropped in April 2026. Logouts will be "risk-based" instead, which hasn't been explained yet.2

Your WhatsApp number's SIM is in another phone, or in a drawer

Act now

Once binding is enforced, the app is meant to stop working when the registered SIM isn't in the device. Move the SIM, or switch the account to the number you actually carry.1

You live abroad and use an Indian number

Check

If the Indian SIM stays active and in your phone, nothing should change. If you've swapped it for a local SIM, watch for prompts. The directions don't spell out what happens to you.

What the rule actually says

The plain version first, then the line from the primary document.

In plain words

Your account is meant to follow your SIM, not just your phone number.

The document saysDoT directions, via All India Radio (1 Dec 2025): apps must make it "impossible to use the app without that specific, active SIM", and log out web sessions periodically.

In plain words

It isn't only WhatsApp. Any app that uses your Indian number as your ID is in scope.

The document saysApps covered: WhatsApp, Telegram, Snapchat, Arattai, ShareChat, Josh, JioChat and Signal, under the Telecom Cyber Security Rules.

What to do

Check that your WhatsApp and Telegram accounts use the number whose SIM is in your main phone.
If WhatsApp asks to check the phone number on your SIM, allow it. Only do this inside the app, never through a link someone sends you.3
Keep that SIM active. A SIM that lapses for non-payment could lock you out of your chats once binding is enforced.
Keep your phone, with its SIM, nearby when you link WhatsApp to a laptop or tablet.

The fine print

Android and iOS don't let apps read SIM details freely, so how apps will check the SIM is still unclear. UPI apps do it by sending an SMS from your phone.2
The government's case is that accounts which keep working after a SIM is removed help scammers stay anonymous. It cites cyber-fraud losses of more than Rs 22,800 crore in a year.1
WhatsApp asked for four to six more months in March 2026, saying it needed to avoid disrupting legitimate users.4

What we don't know yet

What "risk-based" web logouts will mean in practice.2
Whether 31 December 2026 is when binding switches on for everyone, or only when apps must file their compliance reports.2
How the rule will treat NRIs, dual-SIM phones and eSIMs.

Our take

The goal is fair enough: a banned scam account shouldn't be back an hour later on the same number. But this is a blunt tool for a problem that mostly runs out of scam compounds abroad, and the six-hour logout showed how quickly a good intention turns into a daily annoyance for millions of people who use WhatsApp at work. Dropping it was the right call. For now, expect a SIM check prompt, keep your SIM active, and wait to see what "risk-based" turns out to mean.

Change log

11 Oct 2026First draft. Status checked against reporting up to April 2026; no later change found.

Next check11 Nov 2026, or sooner if the rules change.