Set micronet messages (text/ANSON), set micronet messages (text/ANSON), Apple plans to launch a new "Silence Unknown Callers" feature in iOS 13, the main purpose is to help users combat spam calls.

It is understood that this feature can make incoming calls in the user's contact list no longer muted.
It's just that while muting unknown callers is a simple solution, it doesn't recognize spam or dangerous numbers, it just excludes all unknown calls.
Currently, both the iOS 13 Developer Edition and the Beta Edition can activate this new feature, and when iOS 13 is officially released this fall, all iOS 13-compatible iPhone users can use it. (Proofreading/Jurnan)