The latest official firmware for the Cube U9GT5 (version 1.0) is not very smooth and stable.

We have used the Android 4.1 Jelly Bean firmware from the Yuandao N90 FHD (released 2012/11/05) to build a rooted custom firmware for the Cube U9GT5. Our custom firmware should also work on compatible tablets that have the same hardware: Chuwi V99, Visture V4HD, Yuandao N90 FHD.

Custom firmware features:

- root with latest SuperSU 0.99 (free version)

- writable /system partition

- removed most Chinese and unnecessary applications

- increased space for application (/data partition) to 2 Gb

- Google Play Store fixes so more application are visible/compatible

 [[** please register to see this link **]]

Build information:

Linux Kernel: Linux version 3.0.8+ (root@xingyu-desktop) (gcc version 4.4.3 (GCC) ) #60 SMP PREEMPT Fri Oct 12 17:06:41 CST 2012

Android build: rk30sdk/rk30sdk/rk30sdk:4.1.1/N90 DUAL CORE FHD/20121105.094407:eng/release-keys

Download: kasty-cube_u9gt5-based_n90_FHD_20121105-41-rooted.zip

For Cube U9GT5, should also work on compatible tablets: Chuwi V99, Visture V4HD, Yuandao N90 FHD.

Use [[** please register to see this link **]] version 1.5 to flash the firmware, use Restore button.

Please report any problem with this firmware.

This firmware is more stable than the stock and our rooted U9GT5 firmware. 

It's still not very smooth in HD mode, but it's a little better. I'm currently trying other compatible firmwares and will publish them in the [[** please register to see this link **]] try them and see which better fits you…