1) Download the update file (link below video)
2) Drag f_core.dat to the ROOT of the Micro SD card
3) Put the Micro SD card into the M3i Zero
4) Connect the USB update cable to any power source and plug in the M3i Zero
5) A light will flash on and off for few minutes, then remain on for 10 seconds
6) After the light has turned off wait approximately 30-60 seconds longer
7) Re-format the Micro SD card and replace the M3i Zero Kernel
8) The update is now complete and your card is now ready to be used
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How to update M3i Zero to work on DSi v1.4.2 Firmware
DSi v1.4.2 bypass