I have a Chinese tablet the following know specification: A13 Chipset, Motherboard is a YONESTOPTECH-A13-BC7007-20120619 (W-SJ 2612) . I need a firmware that will work with this tablet as it is stuck on the android boot screen and no firmware was supplied originally. The nearest I have found that works with the presumed capative screen is this on: sun5i_android_a13-20120502_CN. Granted this firmware is in Chinese but I have been able to change the language without issues. This firmware however inverts the screen rendering the tablet next to useless. Does anyone know of a working ROM for the Chinese A13 tablets as I have tried a lot and this was the closest, or can anyone change the firmware with correct screen drivers.