For any wireless technology targeting applications that cross borders, roaming is one of the most essential but difficult capabilities to achieve. It remains a key advantage for the cellular industry against unlicensed spectrum alternatives – the painfully won, but well-established roaming systems driven by the GSMA in the early years of cellular. The WiFi segment is global and the Wireless Broadband Alliance has driven roaming technologies into public WLANs, but seamless roaming remains limited. For the unlicensed low power WAN (U-LPWAN) system, roaming – and its corollary, interoperability between different networks and devices – is in its infancy. Two years ago, Orange kicked off an initiative to encourage roaming over LoRaWAN, the leading U-LPWAN technology, and this was a significant…