I am from Chinese developers.Today we bring a new operating system!
It was developed by China OPPO mobile phone manufacturers, the name is color OS.
This is a very unique system, and MIUI is different.I hope you will like it.
Details about the system, you can read here （You need to know a little Chinese）http://baike.baidu.com/view/10825783.htm
COLOR E975 system, the use of patchrom development.
So the hardware is working properly, and in good condition.
Android version:android 4.2.2
Color OS version:1.0
The use of MIUIv5 camera