CN900 Mini Firmware Cannot Write 4C Chip Solution

Some user feedback that after updating CN900 Mini/ND900 Mini (MINI900) key copy machine firmware to, it failed to write 4C, decoding is OK.


Now we’ve got the solution.

MINI900 have developed new CN1 to copy 4C chip. Do not need to use old CN1 to copy 4C.


CN900 Mini CN1 chip, 4.8USD/chip.

(minimum order quantity: 5 pieces)



If you need CN900 Mini specific 4C chip,

please contact:


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