Default [help] yp gs1 freeze problem !

Hello,

I have a problem with an galaxy yp gs1 (wifi 3.6) EU; the device is frozen, I do some hard reset, flash cwm, flash rooted rom, uninstall all apps, format internal storage, but every time the phone returns to the same state with all apps, as if I didn't hard reset or flash another rom or uninstall apps

What can I do ?

thank's
With Google translate