Want to reduce interruptions from numbers you don’t recognize? You can silence unknown callers directly from your iPhone settings. This works alongside Robokiller to enhance your spam protection.

👉 How to enable Silence Unknown Callers on iPhone

1. Open the Settings app on your iPhone

2. Scroll down and tap Phone

3. Tap Silence Unknown Callers

4. Turn the switch ON

When this feature is active, calls from numbers not in your contacts will go straight to voicemail. Your phone won’t ring, but Robokiller will continue to screen the calls in the background when possible.