Change firmware or software to danish


I purchased a samsung galaxy s7 edge from the UK, so android has a vodafone add/commercial in the phone, how do I remove this?
I unlocked it to make it functional here in Denmark.

My question is: Can it be done by changing the software to a Danish/nordic version or do I need to change it to danish/nordic firmware?

Do I need to use Odin for this or do I need a box to do it?

Thanks 🙂