Mobile network EE is to charge customers for using their phone in Europe from January 2022.
The company, owned by BT, had previously said it had no plans to reintroduce the charges after Brexit.
It will affect new customers and those upgrading from 7 July 2021.
They will face a £2 daily fee from January next year to be able to use their data, call minutes and text allowances in 47 European destinations.
The change will not apply to customers travelling to the Republic of Ireland.
British travellers have not had to pay roaming charges on their mobile phone bills since June 2017, when they were abolished after changes to European regulation.
EE to reintroduce EU roaming charges
