Loxar, I guess I need your help:
This is what i did:
Install the root tool in the REDMI 3. Root OK, King root is in the phone menu app.
I copy the system.img to the root of the internal memory of the phone.
OK with USB debuging too...
Them, I start an ADB window, and shell and devices comand went allright.
The the SU command too, but no message on the phone about root in this point.
THEN, I start flashing the phone with "busybox rm -fR /cust/*" command and that's when I get a LOT of error lines, hundreads of them, all with something like "NOT AUTHORISED"
When it stop scroling errors... nothing else happen. I unpluged the phone, try to reboot... and get a boot loop until now.
The only thing I can do now, is start in FASTBOOT, or boot loop...
I already try to flash by fastboot the stable china rom, but it gives always the same "unidentified error" at 1 second...
Here:
http://en.miui.com/a-234.html
My phone is really bricked...
What could I done wrong?
Something about ROOT?
Any help is welcome.