calling from Pakistan to USA

I want to buy the $15 package for calling unlimited to the USA and Canada i read it carefully, and it said regional so my question is that ;

do I need to be in the USA to call in the USA for free (unmetered) or can I call from Pakistan to the USA for free (unmetered) with the $15 (unlimited USA and Canada regional call) package from Zoom phone? 

or to call from Pakistan to the USA for free I'll have to buy the $20 package?