okkkkk, guys, we get the official android 4.2 rom for CX-919, we have did some basic test:
1 Come with rooted:
2 Bluetooth keyboard working;
3 USB Camera, USB Audio Device working, means you can do skype video chat without problem. (tested with Logitech C170)
4 USB Hard Driver working
5 Netflix working
You can download the firmware here;
http://www.mediafire.com/download/wb77dkcoyb4o3n7/geekbuying-cx919-4.2-6210.rar
password: geekbuying.com
How to flash? see this instruction: