Data Cost Control in Roaming watches your data spending while abroad (Zone 2 + 3). Upon reaching the limit the paid roaming data services (excluding daily and monthly fees) will be blocked.
In Zone 1 countries (the EU and Norway, Liechtenstein, the UK and Iceland), the Data Cost Control in Roaming applies only to unlimited data plans, and only if you use up the full amount of data that is intended for use in Zone 1. We charge for additional data based on the amount actually used (at a rate per kilobyte) and the limit applies to data charged in this way.
To log in to My Vodafone you need an email and password.
Here you can check, set or unblock the limit.
The change will take effect within 24 hours. If you do not unblock the limit manually it will be unblocked automatically on the date of your billing period, and you will be able to use the data roaming services continuously.