You may have accidentally enabled call barring settings within your phone’s menu. Modern smartphones allow you to restrict outgoing international calls or all incoming calls, sometimes in the same menu as call forwarding. 3. SIM Card Issues
Furthermore, users attempting to make international calls often find themselves stymied by call barring that they did not personally activate. This is often a default setting applied by network providers to prevent fraud. In such cases, the user must contact customer support to verify their identity and have the international bar lifted. call barred
This is frequently used to manage privacy or avoid disturbances. You may have accidentally enabled call barring settings