Fixed. National roaming not working. Norway
Edit: writing it down helped me understand that i actually never activated "2g or 3g or 4g" in elixir2>information>telephony>turn 4g on.
So this was how i got onecall to work properly, in case there's other Norwegians with the same problem.
In areas where my provider doesn't have reception it uses another provider. My phone then shows that it's roaming and that it has data connection, but in reality it doesn't, i can't access the net. Roaming is activated, the apn of my provider is setup correctly. My provider uses 2g and 3g, the other provider uses 4g as well. When the issue appears it doesn't help to turn on and off airplane mode, doesn't help to turn off and on obile data or to reboot the phone. The problem appears no matter if I choose the other providers network manually or let the phone do it automatically. I tried every possible setting in elixir2 regarding "preferred connection speed - 2g only, 3g onlyn 2g or 3g or 4g and so on.
Anyone with a similar issue on this or a different phone and a possible solution?