WhatsApp wants you to be extra careful before chatting with unknown numbers

WhatsApp is reportedly rolling out a new security feature that warns users before opening chats with unknown numbers. Here is what we know so far.

In Short

• WhatsApp is reportedly rolling out a new security warning for unknown numbers
• The feature could ship for both Android and iOS
• It is said to show the number’s details

If you have ever received a message from an unknown number claiming to be someone you know, you are not alone, and WhatsApp knows it. The platform is now rolling out a new security feature that shows users a warning before they even open a chat with an unknown number, giving them a moment to pause and think before engaging with a potential scammer.

According to WABetaInfo, the new feature is rolling out on both Android and iOS. The warning appears the moment a user tries to start a conversation with a phone number they have never messaged before. It displays where the phone number is registered, whether it is saved as a contact, and whether the two users share any groups in common. From there, the user can choose to continue the chat or cancel it entirely, and the other person will not receive any notification about what was chosen.

Why this matters

The timing of this warning is what makes it particularly useful. Most of WhatsApp's existing safety features kick in after a conversation has already started. This new warning is different. It steps in before anything happens, at exactly the moment scammers are counting on users to act quickly without thinking.

The way many phone scams work is surprisingly simple. A message arrives from an unknown number saying something like "hey, it's me, I got a new number." Nothing has technically been sent to you that looks suspicious, so there is no immediate reason to be on guard. That split second of uncertainty is what scammers rely on. By inserting a warning right at that moment — one that tells you the number is registered in, say, a completely different country — WhatsApp is essentially asking you to stop and verify before you do anything.

It is not foolproof

That said, the feature is not a perfect safety net. If a scammer's number happens to already be saved in your contacts for any reason, the warning may not appear at all. And on the flip side, not every unfamiliar number is a threat. Someone you genuinely know may have simply switched phones and got a new number.

WhatsApp has not detailed exactly what triggers the warning, but a number registered in a different country is likely one of the key factors. If you do see the warning pop up, the safest approach is to take a moment to read the details carefully. If something feels off, cancelling the chat costs nothing. Continuing, on the other hand, could cost considerably more.

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