My iPhone 7 just updated to iOS 12.0 (16A366). While "Settings" said that I was connected to my home wifi, the icon in the upper left corner was LTE, not wireless. Similar garble in "Mobile Security" ... on the "SafeSurfing" page the "Wi-Fi Checker" item reported "...not connected to a wifi network...", though the "Wi-Fi Checker" page said i was connected. No TrendMicro updates were pending. Restarting the phone did not help. Disappointing that I had to delete the "Mobile Security" app to solve the problem!