[Polestar Pete]

I agree, I don’t think you do need a SIM in the slot in order for VOC to work (it uses its own SIM).

But still, Volvo give you (or used to) a SIM card for the internal modem and helps you get it set up. They should also register your car with VOC and get that set up with the app.

It’s a simple enough process to do yourself though.