The "Silence Unknown Callers" feature on WhatsApp is a functionality introduced by Meta, the company that owns WhatsApp. This feature allows users to silence incoming calls from unknown numbers. When enabled, calls from unknown contacts will not ring or cause your device to vibrate, reducing interruptions and maintaining your privacy.

By activating the "Silence Unknown Callers" feature, you can avoid being disturbed by unwanted or spam calls from unfamiliar numbers. Instead of receiving a ringing call, the feature will silence the call and allow it to appear in the Calls tab. This way, you can still see missed calls from unknown numbers and choose to review them at your convenience.

How to Enable the "Silence Unknown Callers" Feature

If you have enrolled to Beta testing, you can proceed. If you don't, you need to join WhatsApp beta testers. Afterwards, update WhatsApp, open the app and go to Settings >> Privacy >> Calls and enable the "Silence Unknown Callers" feature.

Source: Dextrava.com