Is very hard to believe that is fake. The video shows clearly that is a K770 and has flash menus and also has guides about how to install.
Quantifly Sony Ericsson K770i Flash Menu
OK! I have connected, at last, the phone to FARmanager+JDFlasher because my phone has CID53.But can you give me a guide about how to open a k770 with FARManager? I tried to do this by JDFlasher but after a few seconds it giver an error about "Can't find device info in XML [53red]" or something. Can you help me?