Rockchip Firmware Backup Tool =link= 🆕 Validated

: The primary Windows utility used for both flashing and restoring firmware images to eMMC or NAND storage. It can also be used to selectively flash individual partitions like the boot or kernel.

You only dumped the "user" area, not the hidden vendor-specific blocks. Fix: Use Mask ROM mode (not Loader mode). Mask ROM gives raw low-level access.