Because key decryption tools handle proprietary certificates, tools like TagMo are sideloaded via an .apk file rather than downloaded from the official Google Play Store.
the files for the "Unfixed" key and "Locked" key respectively. unfixed-info.bin
While TagMo is the most common use case, unfixed-info.bin is also used in other applications: Instead, it's a configuration file you feed into
For most users, unfixed-info.bin is not a file you open or edit directly. Instead, it's a configuration file you feed into an Amiibo writing tool. The most popular tool for this purpose is , an Android application designed for creating and editing Amiibo. Legality and Safety Considerations
: The data encryption master key (80 bytes).
Includes the character ID, series information, and initialization dates.
The app will validate the keys. Once validated, a green light or success message will indicate that you are ready to scan and write tags. Legality and Safety Considerations