I am on a steep learning curve and I have been wondering about the use case for an external SIM (i.e. as is on the a Notecarrier).
As an example, I am in Canada and I believe the Notecard will work out of the box here. I assume it uses one carrier (for example Rogers) preferentially. Do you need a SIM if that carrier has poor/no coverage in the area?
I see from other questions that some IoT cloud providers offer SIMs.
I know its a dumb question but what are the use cases for an external SIM?