Hi,
To answer your question short - yes, your SIM card will work with the router.
To answer it in more detail:
First of all, I would check if the router itself is compatible with the operator:
https://teltonika-networks.com/product/rut240/#ordering
There are many operators and there are many ways they do things with their SIM card plans. As for a plan that should go for cell phone use - it might be that some of the functionality like VPN, Public IP will not be there without asking for it.
If you're going for a totally Data only plan - the operator should think of possibilities you're going to do with that mobile data, so I believe it should be discussed with them just to know what is being already provided and what you may miss.
In the end - you shouldn't have any problems with your operator from our side, but this question should've been directed to your operator in the first place.
Hope this was helpful.
EB.