maybe this will solve your problem
i also have s4 clone mt6572 ,
try to wipe data,cache from recovery mode.
and reboot, after that you can try framaroot for roo...
I have spent a great deal of time researching before posting this.
I have previously managed to flash and install a custom rom on other Android handsets but I am not sure with this handset as the information around may not be correct for m...