Once removed, restart your phone and test a call. If “Call Barring is On” reappears, your network settings may be corrupted – a factory reset (back up first!) is a last resort.
If you see a “Call Barring is On” message on your O2 phone, it means outgoing or incoming calls (or both) are being blocked by a network-level or phone-level setting. Here’s how to turn it off. 1. Check if It’s Your Phone’s Built-in Call Barring Most Android and iPhone devices have a call barring menu that uses a PIN. To disable: call barring is on how to remove it o2