@Willx I don't remember what android it was running originally.
I used this release from @Nick A https://github.com/NickAlilovic/build/releases/tag/20241007
flashed it onto a microsd card, stuck into the microsd card slot. It boots right into Armbian with Wifi and Bluetooth working. I than used armbian config that you can start from the GUI and flashed the whole thing onto the device's own Emmc storage. Now I don't need the SD-Card anymore.
The Model I have is the 8k Transpeed Ultra HD https://www.aliexpress.us/item/3256805753177410.html?spm=a2g0o.productlist.main.49.4e2cvvt0vvt0XU&algo_pvid=498e6e43-548c-42f9-a41e-5907b1b29398&algo_exp_id=498e6e43-548c-42f9-a41e-5907b1b29398-24&pdp_npi=4%40dis!USD!47.83!20.56!!!338.53!145.57!%402101c5b217306953159191252ed08f!12000034941020300!sea!US!1721927299!X&curPageLogUid=aksBgGStl7UU&utparam-url=scene%3Asearch|query_from%3A
Really cool @heiko910! Do you have a link to your box? What version of Android did it come with? Did you just move the required firmware files to make wifi and BT work? Or did you boot into Android first?