WIFI does not connect as presented – Boingo Wi-Finder Review

My iPhone does not automatically login to supported WIFI Hotspot as presented. Need to open the app and manual authen all times. I asked support team twice and got same answer to uninstall and reinstall app/cert but when ask back on next step is no answer. It’s far from my expectation which receive from competitor service(iXXXX) which I have used previously.
Review by n^som on Boingo Wi-Finder.