The figure more than doubled, from 15% to 31%, according to a Eurobarometer survey conducted in late August and released by the European Commission on 26 September.

According to the commission, across the EU27:

“The share of travellers who never used mobile data abroad halved after 15 June 2017 (21%) compared to the months preceding that date (42%).”

Nevertheless:

“compared to mobile phone use in their home country, 60% of travellers still restricted their mobile phone use when travelling in another EU country since 15 June 2017.”

Among the Luxembourg residents polled (PDF), only 7% shut off their mobile phones while in another EU country, compared to 14% prior to 15 June.

Counterintuitively, 29% of Luxembourg respondents switched off data roaming while traveling after 15 June, compared to 12% who had travelled outside of the grand duchy before then.