How about Xiaomi 5x after brushing the machine?

It is good to brush from MIUI8 to MIUI9.

But it is not good to brush from MIUI9 to MIUI8, and the function of MIUI9 is more full name.

Xiaomi MIUI system is divided into development version and stable version. According to the question you are asking now, you don't know much about the brush machine. I recommend the stable version.

Xiaomi 5x can also brush Android native system in addition to MIUI system. This system is best used abroad, but the built-in Google family bucket can't be used in China, and the convenience of the system is not as good as that of MIUI system. Therefore, it is not recommended to use Android native system (including quasi-native magic CM, etc.). ) there is no in-depth brush.

MIUI also has a foreign version. The only advantage of the foreign edition is that there are no advertisements. The theme is free, but it lacks China almanac in function and is not as convenient as the domestic version. It is not recommended to brush it.

All you have to do is turn on the phone settings and see if the MIUI9 version is as fast as lightning. If so, you don't need to brush your mobile phone. If not, you can upgrade with one click.