On your Windows PC, you need to install the . This allows the computer to recognize the box when it is in "FEL Mode" (flash mode).

Since most H616 devices launch with Android 10 or higher, they support Project Treble . You can use the Treble Info app

Command (requires root):

Despite warnings that custom ROMs might be "dead" for modern phones due to banking app restrictions, they remain a "dream come true" for H616 hardware.

dd if=u-boot-sunxi-with-spl.bin of=/dev/mmcblk2 bs=1024 seek=8 dd if=boot.img of=/dev/mmcblk2p1 dd if=rootfs.img of=/dev/mmcblk2p2 sync && reboot