35 0000# : Activate incoming call barring. 331 0000# : Bar all international calls. 35 0000*16# : Bar all incoming SMS. 330 00... CroszEduverse Managing Call Barring on Your Service - Vodafone Australia Incoming call bar When someone tries to call you, the call won't connect and the caller will hear a message stating that you have ... Vodafone Use call barring to block or unblock calls - EE Call barring allows you to block incoming, outgoing and international calls at home or abroad. This way, you don't have to worry a... EE 7 sites How to turn call barring on your HONOR 200 5G on or off - O2 How to turn call barring on your HONOR 200 5G on or off * Press the call icon. * Press the menu icon. * Press Settings. * Press Ca... O2 UK Call Barring: The Ultimate 5 Steps to End Annoying Calls - Ajoxi Oct 9, 2025 —

O2 call barring is a useful feature that can help users manage their phone use, control costs, and maintain privacy. By understanding the different types of call barring and how to use them, users can take advantage of this feature to customize their mobile phone experience.

Open the and tap the Menu (three dots/settings icon).

This is usually the easiest way to manage specific call types (like international or roaming calls) without memorizing codes.

Here are some common codes used for O2 call barring:

Blocks calls to foreign countries while you are in the UK.

Parents often use call barring on their children’s phones to ensure they aren't calling international numbers or subscribing to expensive SMS services. Troubleshooting Common Issues

Navigate to → Supplementary services (or "Calling accounts" on some devices). Select Call barring and choose Voice calls .

Blocks incoming calls only when you are outside of the UK to avoid roaming fees.

O2 typically implements Call Barring using standardized GSM codes (known as Supplementary Services codes, starting with ** and ## ). Common barring options available to O2 users generally include: