I was in Germany recently and no mobile data access. Basically IN Germany 3g has been switched off so you only get the old E network - next to useless. 48 do not allow 4g roaming so if you are travelling in a country without 3g then you are unfortuna...
I am currently having the same difficulties. Navigated to my sim toolkit and nothing in their similar to what is listed in their troubleshooting. No useful help from 48 either. Really annoyed that they cannot provide useful help with this issue. Appr...