Hi attykinis,
Thanks for reaching out to Microsoft Community and posting your inquiry. We appreciate the interest with Surface Go 2.
The regular sim card should work on this device but it will still depends on how your provider set up your regular sim card. Please check with your provider and verify the network settings of the sim card.
If this answers your question, we highly encourage you to inform our Community by clicking on Yes or marking my post as an answer. This will help other members who may have the same issue as you. Otherwise, don't hesitate to update us so we can further assist you.
Kind regards,
John Neil_J