I have travelled to portugal and can't access my mobile data. International roaming is enabled in the id app but my phone won't let me turn on roaming. The option is greyed out and a reboot hasn't helped. I've seen another person with this issue on here a week ago, but cant see what they did to resolve this.
My husband has exactly the same issue. We both have Samsung S23 fe. Which is the same phone the other person also had!