O2 customers will be able to use their UK voice, text and data allowances in 47 countries from June 15.
It means Pay Monthly and Business customers will be able to go abroad without incurring roaming fees.
Customers with the appropriate plans won’t have to do anything next time they travel, the switch will be automatic.
O2 is the last of the four major UK networks to eliminate roaming fees before they’re abolished in the EU on June 15.
Related: How EE’s free roaming deals stack up
Whether UK customers will retain these free-roaming rights after Brexit remains to be seen.
Our best guess is UK networks will be able to hammer out deals with their European counterparts (some of whom have ownership tie-ins) to keep Brits roaming charge-free.
Will the abolishing of EU roaming fees put more holiday money in your pocket this summer? Drop us a line in the comments below.