Galaxy S Duos 2 - No OS installed currently Well I started with CWM to get Cyanogenmod 12 but all I did was remove any OS present.Now no OS is currently installed, and I cannot install any ROM as any installation fails with error 7. I tried to fix it with many possible solutions, none of which worked.


deleting assert,
updating binary file for patch,
replacing set_metadata with set_perm.


Now what to do? It will be great to get the stock ROM back.
You could try installing a factory firmware through ODIN. You can find instructions here.

For the latest firmware, you can look on SamMobile.