There are several reasons why you might want to deactivate call barring:
If codes aren't your thing, iPhone users can manage this directly through the Settings menu. deactivating call barring
Dial these from your phone’s keypad and press call: There are several reasons why you might want
If you're unable to access your phone's settings or menu, you can try using USSD (Unstructured Supplementary Service Data) codes to deactivate call barring: deactivating call barring