The Hologram Nova is a cellular modem purpose-built for IoT development with single board computer compatibility and Hologram software tools. For more information about the Nova, please refer to this page.
The latest iteration of the Cat-M1/NB-IoT Nova uses the U-Blox R410-02B modem which supports global bands for Cat-M1 and NB-IoT. As Cat-M1 and NB-IoT networks mature globally Hologram will continue to work on integrating these networks, but until then the Cat-M1/NB-IoT coverage will likely require testing in the respective countries of use.
For more info on Hologram's Cat-M1/NB-IoT coverage please visit this page.