In Spain, can't get data to stay working. APN gets replaced by lots of foreign ones, a restart sorts sometimes, had data for few minutes, lost again.Tried adding APN manually, disappears also.. Worked fine at home. Galaxy S5
Yeah, unfortunately lots of people are having problems with EU roaming data on a Guido membership even though it should just work. All I can suggest is that you contact 48 support and see if they can offer any advice because the different suggestions posted here so far don't seem to work in many cases.
Hope this helps.
I am not a 48 employee so if you need to contact 48 support then use option 3 or the chat facility here.