Have you tried this?Go to settings >> About Phone and copy your IMEIThen go to dialpad and type *#272*IMEI#You can check your CSC Status there.If you see multiple options in the preconfig menu (more country codes) you are already on a multi CSC firmw...

Go to settings >> About Phone and copy your IMEIThen go to dialpad and type *#272*IMEI#You can check your CSC Status there.If you see multiple options in the preconfig menu (more country codes) you are already on a multi CSC firmware. So install by p...