Sorry, but I cannot find any way to re-scan the two-factor setup? I am logging in on a new device and the forum asks for my two factor code … unfortunately I have gotten a new mobile phone in the meantime, so I haven’t registered my Google auth with the forum here.
I remember something about scanning a code when I signed up … assuming that is right, where can I then scan that again?
(The FAQ section could use something about this)
After some searching, it turns out you cannot restore two-factor login on a different phone. The choice I have found are:
Resurrect the old phone, disable two-factor login with it (you need the 2F code for this) and then activate it from the second phone.
Convince an administrator to disable 2F for your account (this should be rather difficult to avoid social attacks). The enable it again from the second phone.
Use the 2F backup codes you can copy from the 2F setup. But you need 2F to access this … so it must be done before ditching the old phone.