Unfixed-info.bin _hot_ Jun 2026

: If an app like TagMo says "unfixed key not found," it cannot process any Amiibo files. You must locate and import the file through the app's internal file manager.

Without unfixed-info.bin (and its counterpart locked-secret.bin ), you cannot write functional data to a blank NFC tag (NTAG215) that a Nintendo console will recognize. unfixed-info.bin

: The tool combines the 80-byte master key from unfixed-info.bin with the specific Amiibo’s UID and character data to derive a unique set of one-time session keys. : If an app like TagMo says "unfixed

Handles the decryption of the "core" identity of the figurine. : The tool combines the 80-byte master key from unfixed-info

Information that changes based on use, such as game-specific save data, nicknames, or leveling stats.

To understand unfixed-info.bin , you first have to understand how an Amiibo is structured. Every Amiibo contains a small NFC chip (NTAG215) with encrypted data. This data is split into two main conceptual parts: