it says. “To check that roaming's activated on your account, log-in to the iD Mobile app or My Account online, go to 'My Services' then 'Roaming'. If it's off, toggle it on. “ however when you go into the account and into the mobile app there is no tab that says my services.
I had no calls, no data, no usage of my phone while I was recently in France, it only worked if I was on Wi-Fi.