whenever i go abroad for example italy last summer i did all the steps in the roaming guide and still my roaming wasn’t working anywhere i go and couldn’t use my phone for the whole holiday. I’m going abroad soon and would like to know how to sort this issue before i go.
Try these threads:
If they don't help then you'll have to contact 48 support for further assistance.
See the link in my signature below or email them at firstname.lastname@example.org
If your SIM predates January 2023 then you might want to get a replacement in case that helps:
I had terrible trouble with Roaming, I reordered a new sim and that worked. They have a newer version of their sim cards that worked. Mine was 3 years old I think. So if you're Sim is an old one I'd replace it.