Oh s**t, but can I try to extract firmware from another (updated, of course) V800?

Question n.2: How to Recovery a phone with damaged certificates? When I try with my SeTool2 it says "bad file, will not flash it" even if I don't put anything in any field. How solve this problem? With USB-Smart SEMC Tool v.8.4, it says that certificates are restored, but when I try to flash it doesn't flash and says that the phone hasn't valid certificates (or something else).

Thanks for help.