Call Barred Means Official

If you cannot disable it through settings, the restriction is likely on the network side. You will need to contact your provider's customer service to lift the bar.

Restricts all communication (incoming and outgoing) while you are outside your home network's coverage area. Why You Might See "Call Barring" Active

Unlike simple call blocking, which happens on your local device, call barring is usually a provided by your carrier. Common Reasons for Call Barring