This is the hardest part. Allwinner does not host firmware publicly. Sellers expect you to contact them.
: Insert the USB drive into one of the unit's rear USB ports. Initiate Update Allwinner K2501 Firmware Update
Offers updated system fonts, crisper layouts, and occasionally permits new desktop launchers supporting Picture-in-Picture (PiP) windows. This is the hardest part
Marco sat in the silent Civic. The microphone LED was off. The update had worked perfectly. Allwinner K2501 Firmware Update