Nighthawk hotspot device...

Let me start by saying this, I have the unlimited plus plan, the one that was relaeased last year. And I want to order a nighthawk hotspot because I do not get any internet provider where I live at the moment. I know you can’t add a hotspot device to the current unlimited plans (The Unlimited and More (SM) plan).... So my question is can I add the hotspot device to my unlimited plan, the unlimited plus plan.