The latest publication from the Wireless Broadband Alliance offers a heap of advice to public WiFi providers on how to best provide connectivity for end-users. The WiFi Alliance’s Passpoint specification makes a prominent appearance, of course, but for operators, the moments that public cellular networks interact with these public WiFi ones require a lot of thought. To use a clunky metaphor, the current dynamic of public cellular, private cellular, public WiFi, and private WiFi, are soap bubbles being forced up against each other in a tub. At some point soon, without any audible pop, those bubbles are going to merge into one. In a very short span of time, from a user perspective, this convergence trend will see users able…