Since many international call bars are placed at the network level for security or credit reasons, contacting O2 directly is the most reliable way to lift them. : This is free from your O2 mobile.
Note: Removing international call barring will allow you to call numbers starting with + or 00. Please be aware that calling international numbers incurs extra charges unless you have an international add-on or a specific tariff. how to remove international call barring - o2
If you are asked for a PIN to remove the bar and 1234 or 0000 does not work, This is a SIM card lock. You must contact O2 to request a PUK code or a barring PIN reset. Since many international call bars are placed at
You have followed the steps, but the "Remove Barring" button is grey. Why? Please be aware that calling international numbers incurs