days of struggle have been solved ...
Searching Samsung modem... detected COM120
Reading phone info... OK
Model: SM-G935FD
AP version: G935FXXS2DRA9
CSC version: G935FOJV2DRAG
CP version: ********
Product code: XSG
Phone SN: 00000000000
Unique number: AD061702160291834E
Reading IMEI... OK
IMEI: 351**********7808 (SIGN: OK)
IMEI 2: 351************7806 (SIGN: OK)
Done with Samsung Tool PRO v.31.0
Searching Samsung modem... detected COM120
Reading phone info... OK
Model: SM-G935FD
AP version: G935FXXS2DRA9
CSC version: G935FOJV2DRAG
CP version: ********
Product code: XSG
Phone SN: 00000000000
Unique number: AD061702160291834E
Reading IMEI... OK
IMEI: 351**********7808 (SIGN: OK)
IMEI 2: 351************7806 (SIGN: OK)
Done with Samsung Tool PRO v.31.0