03-06-2019 10:18 - edited 03-06-2019 10:18
Any use of your phone outside of the EU in O2 travel supported countries will incur a travel chage of £4.99 (inc VAT) per day.
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 03-06-2019 10:20
Where did you travel to? If within the EU you shouldn't have been charged unless you went over your allowances
Outside the EU you would have been charged £4.99 a day for O2 travel if you had the bolt on
If you have any queries you can look in My O2 and see what the charges were for. If you disagree with you bill then you need to contact customer services