  Radio communications using the unlicensed Sub-GHz bands are expected to play
an important role in the deployment of the Internet of Things (IoT). The
regulations of the sub-GHz unlicensed bands can affect the deployment of LPWAN
networks in a similar way to how they affected the deployment of WLAN networks
at the end of the twenty's century. This paper reviews the current regulations
and labeling requirements affecting LPWAN-based IoT devices for the most
relevant markets worldwide (US, Europe, China, Japan, India, Brazil and Canada)
and identify the main roadblocks for massive adaption of the technology.
Finally, some suggestions are given to regulators to address the open
challenges.
