Hello guys,
Look this russian video: www*youtube*com/watch?v=jPoKYCMbaqM (no permission for direct link :()
It seems that this guy upgrade the mi4c to Android 7 and just after downgrade to 6.1.7, without the bootloader bullshit.
The steps:
-boot in recovery TWRP 3.0.2.0
-swipe...