The Wireless Broadband Alliance (WBA) has its roots in helping public WiFi operators to roam and interoperate across their hotspot networks. While its remit may be wider these days, it has returned to those roots by adopting Cisco’s OpenRoaming technology, with a view to establishing a global standard for WiFi roaming. One of the disadvantages for WiFi operators, compared to cellular, is that they do not have the seamless, global, transparent roaming system that has been a key factor in the success of mobile networks from GSM onwards. That cellular roaming was hard-won, and challenges continue to arise with each new generation of technology – roaming between network slices is a popular topic of conversation now. But users greatly benefit…