Remove Call Barring O2 -

For most Android devices like Samsung Galaxy or Nothing Phone, follow these steps: Solved: Call barring password - O2 Community Forum

To remove call barring on O2, you can typically disable it through your phone's menu or by using the default O2 barring PIN, which is 0000 . If you encounter a network error or have an unpaid bill, you may need to contact O2 customer service directly by dialing 202 from your O2 mobile. How to Remove Call Barring on Android remove call barring o2