Hello iojensen.
Seeing that you've posted in the Volla Tablet forum, I'll assume your question refers to the Volla Tablet.
In that case the answer is 2G, 3G or 4G. The only Volla device capable of 5G at the moment is the Quintus phone.
My answer is derived from the url below. There is a lovely comparison table at the bottom of that page.
https://volla.online/de/volla-tablet/