NAND / SPI uses similar offsets with custom bad‑block handling.
Launch PhoenixSuit and navigate to the tab. Browse and select your .img firmware file. Allwinner H3 Firmware
A Windows utility used to burn an Android .img file onto a MicroSD card in a special "production" or "startup" mode. Production mode forces the H3 device to automatically flash its internal storage when booted from the card. NAND / SPI uses similar offsets with custom