You should install SuperSu from the store. In the app there's the "UNROOT" option. But take care, don't know if it's really safe...
Can I ask you a thing, you have installed MIUI 7 right? Usually Android phones keeps charging when you unmount storage. My Mi 4c simply stops charging from USB when I safely remove it from my PC. It happens the same with your phone? Thanks
You should install SuperSu from the store. In the app there's the "UNROOT" option. But take care, don't know if it's really safe...
Can I ask you a thing, you have installed MIUI 7 right? Usually Android phones keeps charging when you unmount storage. My Mi 4c simply stops charging from USB when I safely remove it from my PC. It happens the same with your phone? Thanks
I have just installed SuperSU v2.46 in TWRP (http://download.chainfire.eu/supersu)
SuperSU has the function Full unroot (Cleanup for permanent unroot)
If you need root than install SuperSU in recovery again