(Solved)CN900mini/ND900mini firmware cannot write 4C

Some customer  feedback that after updating CN900mini/ND900mini key copy machine firmware to,it failed to write 4c,decoding is ok.

Here is the solution from obdexpress.co.uk :

Mini 900 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:5pieces)

If you need CN900 Mini specific 4c chip
please contact: