MTK6572 | Help with Drivers

Hello , i need some help because i brick my cellphone , before brick them i make a backup but don't work and i need to install a CustomRom . I have STOCK "System" folder .
I tested some CRoms in my MTK6572 , Android 4.2.2.
AOSP JB - Works fine except camera (see dark) and the microphone (bad sound) .
MiUi V5 - Slow performance , Camera works 100% except Front camera , Microphone issues.
LollyFox 1.9 - Medium Performance - Camera works except front camera , microphone issues
And now i have : S5 TouchWhiz , Camera see dark , front camera don't work , and the microphone don't recor fine , i can't remove floating ToolBox but there are no problem , the my problem is the camera see dark . front camera (don't work) and microphone .
I have STOCK system folder of the original stock Rom .

The cellphone is a clone ,and not have any info of the creator (i don't find in any part on my cellphone)

Thanks for the help .