I have access to my 1Password account on my new phone and on my Windows 10 PC but cannot login to the web or setup a new device without the authenticator app on the old phone. To be honest it is very clear that one needs to keep their secret key and master password safe. However, it is not clear at all that one should somehow backup their 2-factor authentication code in any way. Moreover, the concept is completley contradictory to every other app or service available that makes use of 2-factor authentication. There is always a backup method, i.e. text message, email, etc., that can be used in case the authenticator app is lost, stolen or otherwise unavailable.
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