In iOS 27, a feature called Impersonation Risk Detection has appeared: the system analyses incoming messages and calls and warns you if the person on the other end is pretending to be someone else — a bank, a delivery service, a "security service" or an acquaintance. The signs of impersonation are gathered on the device, so personal data never leaves it.
It works quietly: while everything is normal, you notice nothing. As soon as details typical of a scam appear in a conversation, the iPhone shows a warning right in the chat — before you've had time to transfer money or read out a code from an SMS.
The headline sounds loud, but the setting is hidden: the feature is off by default, and it's turned on manually in the security section of settings. The exact path depends on the build, so it's easier to look in settings once and search by name.
Turn it on — and let the only thing bothering you on your phone be a dead battery. 🙂