Custom Rom: Allwinner H6
Here is the hard truth about the Allwinner H6: There is no universal custom ROM.
Unlike a smartphone (e.g., a Samsung or Pixel), H6 boards vary wildly. A ROM for the Tanix TX6 will not boot on the Orange Pi 3 because of different:
You must match the ROM to your exact PCB version. allwinner h6 custom rom
For those using their H6 box purely as a media player, these are excellent.
Best for: Those who want Android but cleaner. Here is the hard truth about the Allwinner
setenv kernel_addr_r 0x40080000
setenv fdt_addr_r 0x4fc00000
fatload mmc 0:1 $kernel_addr_r Image
fatload mmc 0:1 $fdt_addr_r sun50i-h6-orangepi-3.dtb
booti $kernel_addr_r - $fdt_addr_r
Convert: mkimage -C none -A arm64 -T script -d boot.cmd boot.scr
Where to find them:
Yes, with caveats.
The Allwinner H6 is a beast when unleashed, but the fragmented hardware ecosystem means you must do your homework. Check the Armbian forum or Freaktab before you flash, and always keep a copy of your original firmware handy. You must match the ROM to your exact PCB version
Disclaimer: Flashing custom ROMs voids your warranty and carries a risk of permanently bricking your device. Proceed at your own risk.