Some strange .. if it is allwinner it is NOT a rockchip device as are all the MTCB and MTCD units here covered (rockchip rk3188)
So the manufacturer is not telling the truth.
You have to go to device information to see if it is a mtcd or not.
Edit --> it seems that your unit is covered by this forum
Enviado desde mi D6603 mediante Tapatalk
i have allready try some roms, but i want to upgrade to 5.1.1. I have mailed with the manufacturer about the mcu and he told me that it is a MTCD.
It should be possible to port a 5.1.1. rom to the R16 allwinner and rockchip rk3188.