You must make (reboot to system) from recovery after flash
After flash make wipe data from recovery
G955NKSU3DSBB G955NOKR3DSBB (KTC) 4 FILES FIRMWARE 9 HALABTECH
YOU MUST MAKE REBOOT TO SYSTEM FROM RECOVERY AFTER FLASH
YOU MUST MAKE REBOOT TO SYSTEM FROM RECOVERY AFTER FLASH
YOU MUST MAKE REBOOT TO SYSTEM FROM RECOVERY AFTER FLASH
YOU MUST MAKE REBOOT TO SYSTEM FROM RECOVERY AFTER FLASH
G955NKSU2CRF5 android 8.0.0 firmware 5 files halabtech.zip
G955N 7.0 Firmware