https://community.o2.co.uk/t5/Tech-Support/Call-barring-password/m-p/1608993#M31319 <P><a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/5116936">@Vatof</a>&nbsp;</P><P>The default pin is 0000 so if not working, it must have been changed in the past.</P><P>Older pin's were 5555 or 4321 so it may depend on the age of your sim.</P> Thu, 16 Mar 2023 18:44:17 GMT MI5 2023-03-16T18:44:17Z https://community.o2.co.uk/t5/Tech-Support/Call-barring-password/m-p/1608989#M31318 <P>Hello,</P><P>I am unable to change the call barring status &amp; password. I tried using 0000 or 1234 both don't work. &amp; I really don't want to restart factory settings.&nbsp;</P> Thu, 16 Mar 2023 18:35:22 GMT https://community.o2.co.uk/t5/Tech-Support/Call-barring-password/m-p/1608989#M31318 Vatof 2023-03-16T18:35:22Z https://community.o2.co.uk/t5/Tech-Support/Call-barring-password/m-p/1608993#M31319 <P><a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/5116936">@Vatof</a>&nbsp;</P><P>The default pin is 0000 so if not working, it must have been changed in the past.</P><P>Older pin's were 5555 or 4321 so it may depend on the age of your sim.</P> Thu, 16 Mar 2023 18:44:17 GMT https://community.o2.co.uk/t5/Tech-Support/Call-barring-password/m-p/1608993#M31319 MI5 2023-03-16T18:44:17Z