Within the EU we have Roam Like at Home or “RLAH” as it is called. It is an EU directive to make it cheaper for consumers from EU member states to surf within the EU.
For you with a Dstny subscription, this means that a certain amount of data roaming within the EU is included in your subscription. The amount of mobile data you are allowed to use abroad is called the Fair Use Policy or “FUP” and is based on your subscription’s data package in Sweden.