My school, like so many others here, has forcibly implemented this garbage 2 factor app on our accounts and if I don't use it, my account gets locked. My phone was recently blocked by my carrier from making and receiving calls (it is too old). There was a problem during the app setup, and now the only way back into my email is...to call my phone. I'm about to tear my hair out. Why is there no SMS account recovery!? I'm switching carriers soon but until then, I am locked out of my school email which is absolutely terrible. Screw my school and screw Duo for forcing me onto this useless app when I already have Authy and could have used that.