Download latest Android KitKat 4.4.2 stock firmware for Cloudnetgo CR12S TV Box from here or from here. Download previous firmware from here. Download another Cloudnetgo firmware from here.
Archive: CR12S_cloudnetgo_AP6330_20141224
Firmware image file: CR12S_cloudnetgo_AP6330_20141224.img
Model: Cloudnetgo CR12S TV Box
Image file size: 480 MB
Platform: Rockchip RK3288
Boot version: 2.17
FW version: 4.4.02