Unlike call blocking (which works on a contact-by-contact basis, often on the device), call barring is usually set up through your mobile carrier and applies to entire categories of calls, such as all international calls or all incoming calls when roaming . Depending on your carrier and phone, call barring typically includes:

Here’s a short feature-style explanation of — suitable for a blog, app help section, or glossary. 🔒 Feature: Call Barring – Take Control of Your Calls What Is Call Barring? Call barring is a network-level feature that lets you restrict specific types of outgoing or incoming calls on your phone. Think of it as a doorman for your calls — you decide who can get through and which numbers your phone can reach.

Settings → Phone → Call Barring (if supported by carrier; not all carriers enable it on iPhone)