How can I disable Silence Unknown Callers? Follow To disable Silence Unknown Callers: In the Settings app, navigate to: Phone > Silence Unknown Callers Disable Silence Unknown Callers. Related articles How can I activate Nomorobo Max? How can I deactivate Nomorobo Max? How can I disable Call Forwarding? Why do I need to silence unknown callers? How can I activate Nomorobo Basic on my iPhone?