Download latest Android KitKat 4.4.2 stock firmware for Nagrace HPH NT-V6 TV Box from here or from here. You can download previous firmware version from here. Download a newer firmware version from here.
Firmware： OTA_TRN6A_HPH-FO-N6_RK3288_4.4.2_EN_US_FT0_V1.4.1_150107Model: HPH NT-V6
Image file size: 1,35 GB
Platform: Rockchip RK3288
Build number: rk3288-eng 4.4.2 KOT49H eng.liangkd.20150107.152406 test-keys
Nagrace HPH NT-V6TV Box Specs
* CPU: RK3288 28nm Cortex-A17 Quad core
* GPU: Quad-Core Mali-T764 3D GPU Support OpenGL ES1.1/2.0/3.0, OpenVG1.1, OpenCL1.1 and Renderscript , Directx11, 2D GPU support 8Kx8K input，4Kx4Koutput
* RAM: DDRIII 2G/4G optional
* Nand flash: 8G/16G/32G max up to 64GB optional
* HDMI2.0,Support 4K x 2K decode output
* HDMI Input: Support max up to 1080P(60Hz) input
* Support H.265 Hardware decoding
* Support 1000MB Network
* 3 x USB2.0 Host,
* 1 OTG
* 5M Cam(Optional)
* OS: Android 4.4
* GPU: Quad-Core Mali-T764 3D GPU Support OpenGL ES1.1/2.0/3.0, OpenVG1.1, OpenCL1.1 and Renderscript , Directx11, 2D GPU support 8Kx8K input，4Kx4Koutput
* RAM: DDRIII 2G/4G optional
* Nand flash: 8G/16G/32G max up to 64GB optional
* HDMI2.0,Support 4K x 2K decode output
* HDMI Input: Support max up to 1080P(60Hz) input
* Support H.265 Hardware decoding
* Support 1000MB Network
* 3 x USB2.0 Host,
* 1 OTG
* 5M Cam(Optional)
* OS: Android 4.4
