Data not working in Copenhagen

[Effica]

I have enabled data roaming and I still have 8GB of data left. It appears that the 5G is enabled on my phone, yet I couldn’t access to the internet when I use my data. Is there any solution for this problem. 

[sc1999]

Set the phone to 4g, it may help.

[Effica]

Thanks for the suggestion. However it does not solve my issue.