WhatsApp is rolling out a new security prompt that appears before a user opens a chat with an unknown number. The warning is designed to create a brief pause at the exact moment people are most likely to respond too quickly.
That timing matters because many scams succeed in the first few seconds, when users react before checking the details. By showing information earlier, WhatsApp is trying to make that split-second decision more deliberate.
What the warning shows
According to WABetaInfo, the feature is being introduced for both Android and iOS. It appears when a user tries to start a conversation with a number that has not been contacted before.
The screen provides a few basic details that may help users judge whether the chat looks legitimate. Those details include the country where the number is registered, whether the number is already saved as a contact, and whether the two sides share any groups.
| Information shown | Why it matters |
|---|---|
| Country of registration | Can reveal a mismatch with the identity the sender claims |
| Saved in contacts | Shows whether the number is already familiar to the user |
| Shared groups | Provides additional social context, though not a guarantee of safety |
After seeing the prompt, users can either continue the conversation or cancel it entirely. The other side will not receive any notification about that choice.
Why the timing is important
The main strength of the feature is that it appears before the chat really begins. Many other WhatsApp protections only take effect after a conversation is already underway, which leaves less room to pause and verify.
Scammers often rely on that hesitation-free moment. A common tactic is to message from an unfamiliar number while claiming to be someone known to the recipient and saying they have a new number.
In that situation, the message may not look suspicious at first glance. That is exactly why a brief warning can matter, because it interrupts a response that might otherwise happen automatically.
Useful, but not foolproof
The new prompt is not a complete shield against fraud. If a scammer’s number has already been saved in the contact list for some reason, the warning may not appear at all.
At the same time, not every unknown number is dangerous. A real acquaintance may also reach out from a new number after changing a phone or SIM card.
WhatsApp has not explained every trigger that causes the warning to appear. However, a number registered in a different country is said to be one likely factor behind the alert.
For users, the safest response is to stop and review the information before replying. If anything looks inconsistent, cancelling the chat carries no risk, while rushing into the conversation can open the door to a much larger problem.
