It works on password protected networks including your phone as a hotspot which is what I think the original person referred to.
I did this in France using a Sim card in my phone that allowed me to turn on hotspot. I just had to connect to it with the wahoo app using password for my phone hotspot and then all set.
Unfortunately my US cell provider doesn’t allow hotspot unless you have a much more expensive plan. Prepaid sims in France are an incredible bargain… Around $30 for 20gb of high speed data and unlimited calls and texts for a month.