Right, but they are the only one source of information available when you don't know the actual situation on the local market.
Possibly they have launched some new mvno pre-paid offers, but how do I get to know their offer or even brand?

Well, I will have to check out if all the data concerning Norwegian offers is still up to date.
That's why I asked you my "pre-paid gsm forum" friends about your personal experience in this area

.