Hi Friends,
thanks all for help and comments.
This K790 is alive again and I uploaded original GDFS which I made as backup. Also XS++3.1 made backup of GDFS before writing new GDFS.
"C" key did not work. My Magic Keys (for me) "Hold 2 and 5 keys then insert USB cable"

I also uploaded K790_R1EG001_MAIN_GENERIC_RED49 and K790_R1EG001_FS_AMERICA_2_RED49 file to Phone.

BUT main problem is still there. IT IS STILL LOCKED. lol:mad:

So Question is How to get Unlock Code ?

thanks again all for help

take care,