How to Silence Unknown Callers

Silencing unknown callers can be useful when repeated calls are disruptive, but it may also hide a legitimate call from an unsaved number. Review voicemail and filtered calls if you are waiting for a clinic, service provider, or delivery contact.

On iPhone, the current Apple call-screening guide describes options under Settings → Apps → Phone. On Android, settings differ by manufacturer; the Phone by Google block guide explains its unknown-number setting and its limits.

If an unknown caller claims an urgent account problem, verify through the organization’s official channel. See how to identify suspicious calls.