I've changed phones over the Christmas period but haven't fully retired my old phone yet.
Is it possible to set up my new phone as an additional authenticator for logging into OZB? (i.e. if I lose my main phone, I still have my old phone that can be used to verify my OzB login?)
Most auth apps allow cloud syncing. If you don't want to use the cloud you can redo 2FA and scan the new 2FA QR code on both phones at the same time.
OzBargain gives you 10 one-time backup codes for emergencies.