No back up
If you switch to a new iPhone and sign into iCloud and it restores from a back up it won’t restore all of your previously save security codes. There’s no way to export them and move them over, so you’re pretty much screwed. This is a huge flaw in their app. And there should be some sort of Touch ID authentication when opening the app. What a piece of garbage. Google is slackin.
CorySchulz about
Google Authenticator, v3.0.0