Phone carriers offer various services to combat spam calls, including call-blocking features, call-filtering technology, and partnerships with third-party apps like Nomorobo2. These services help identify and block suspicious calls, warn customers about potential spam calls, and provide options for customers to report and block unwanted numbers.
Silencing unknown callers on an iPhone is a feature introduced in iOS 13 that directs calls from unknown numbers straight to voicemail, without ringing your phone5. To enable this feature, go to Settings > Phone > Silence Unknown Callers and toggle it on. You will still receive notifications for calls from people in your contacts, recent outgoing calls, and Siri Suggestions2.