If you are on iOS 13 or higher you can: https://support.apple.com/guide/iphone/avoid-unwanted-calls-iphe4b3f7823/ios https://support.apple.com/guide/iphone/avoi

If you are on iOS 13 or higher you can: https://support.apple.com/guide/iphone/avoid-unwanted-calls-iphe4b3f7823/ios https://support.apple.com/guide/iphone/avoid-unwanted-calls-... Scroll down to the last section "Send unknown and spam callers to voicemail". You want to activate the Silence Unknown Callers feature. Go to Settings > Phone, then tap any of the following: Silence Unknown Callers: You get notifications for calls from people in your contacts, recent outgoing calls, and Siri Suggestions. Call Blocking & Identification: Turn on Silence Junk Callers (available with certain carriers) to silence calls identified by your carrier as potential spam or fraud.