Golden Rule: The firmware must match the Flash ID. You cannot flash a 05.xx.xx (Hynix) firmware onto a Toshiba NAND drive. The controller will reject it, or worse, enter an unrecoverable state.
Advanced users may flash the firmware to change the Vendor ID and Product ID. This is sometimes done to: phison ps2251 07 firmware
ChipGenius is a faster, less technical alternative. Golden Rule: The firmware must match the Flash ID
If you are attempting to repair a drive or change its configuration, you will need the Phison MPALL Tool. Advanced users may flash the firmware to change