The closest I've ever come to falling for a Gmail phishing attack 10 years ago
I was a huge fan an evangelist of Duo up until the Duo Mobile 3.15.0 update December 13, 2016, which disabled the ability to approve Duo Push from a locked phone (lock screen, Android Wear). That change was horribly communicated and has been inadequately defended when challenged, and has shaken my faith in Duo.