Use adb delete system 2 and installed finish ROM next backup rom and retore full store system. Or use Miflash flash ariescore recovery single by m11kkaa. I apologize for not fluent in english.
There are problems with bluetooth. I sent one 20MB file, but 10 minutes later I was just prints the 3%. As I understand it Mi2S is equipped with Bluetooth 4.0 with 20Mb speeds are less than 1 minute 30 seconds
Thank you very much. I'm trying to MIUIFLASH. If your case can not be done to help stop it? I used 32G Xiaomi MI2S should not understand much about it. Before that I used Pantech SKY.