Quote:
Originally Posted by TenFour
... like your phone breaks and you can't access the 2FA codes any other way.
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When I established 2FA (using FreeOTP app) with several services, such as FastMail, Google, Dropbox, I wrote down the "secret string" and entered it manually in another copy of the app in an old phone. Then when I don't have my phone (such as when I broke the screen) I can use the older phone instead. It has no SIM but it's not needed for producing OTPs. You just have to make sure the time is set correctly. You can write the data on a piece of paper and when needed use it with any OTP app that allows you to type in the secret string. On paper it is safe from hackers using
PDF vulnerabilities and the like.