[arubania2]

This is what one-time backup codes are for.

Alternatively you can purchase a hardware key and store it in a trusted place, but admittedly they are expensive, so OTBC is the usual route.

[zmmmmm]

yes I am confused why people aren't discussing OTBC ... is it an assumption that if you lose all your possessions then you lost these as well? Doesn't seem valid as you can certainly give them to a trusted person for safe keeping as well. Or bury them in the ground if you want somewhere.