Esto es lo que me sale al flashear el firmware
C:\fastboot>fastboot flash zip firmware.zip
sending 'zip' (51216 KB)... OKAY [ 6.128s]
writing 'zip'... INFOzip header checking...
INFOshift signature_size for header checking...
INFOzip info parsing...
INFOchecking model ID...
INFOchecking custom ID...
FAILED (remote: 42 custom id check fail)
finished. total time: 6.585s