AT&T, Verizon and T-Mobile Users Hit by Service Outage in Europe
New York Times
The disruption affected mostly visitors with AT&T, T-Mobile and Verizon service, cutting them off data networks across the continent for 24 hours or more.
https://www.nytimes.com/2024/06/27/travel/att-t-mobile-verizon-international-outage.html