Since 2017, the abolition of roaming charges has been one of the most popular reforms for EU consumers, allowing Europeans to use their national mobile plans throughout the EU at no extra cost.

According to the European Commission, mobile data usage increased 17-fold in the summer of 2019, compared to the summer of 2016, before these costs were removed.

It affects all 27 EU member states, as well as Iceland, Liechtenstein and Norway, but not Britain, which permanently stopped applying EU rules on January 1.

The arrangement was renewed after a political agreement between the European Parliament and Slovenia, which is currently holding the EU's rotating presidency.

"The 'roam like at home' policy has made communication easier and cheaper whenever people are travelling in Europe," said Slovenia Public Administration minister Bostjan Koritnik.

He called it one of the EU's "greatest success stories".