j200f/ds unlock error

j200f/ds not unlock error for downgrade firmwear
plz tell me which file i use

1. Power on the phone.
2. Connect the phone to PC with USB cable.
3. Check Samsung modem in device manager, install drivers if needed.
4. Press ‘Unlock’ button for direct unlock or ‘Read codes’ to read security codes.

To reset Google account activation or Samsung reactivation lock:
1. ADB must be activated in any way (you can flash sBoot from combination firmware,
make sure, that you are not upgrade sBoot).
2. Connect phone to PC with USB cable, install drivers if needed.
3. Select device in ADB settings.
4. Press ‘Reset FRP/React/EE’ to deactivate Google/Samsung/EE account activation lock.
(Sometimes needs to perform ‘wipe data/factory reset’ once more, to complete this locks removal.)

Operation: Unlock
Selected model: SM-J200F
Software version: 27.1

Searching Samsung modem… detected COM6
Reading phone info… ok
Model: SM-J200F
AP version: J200FXXU2APJ1
CSC version: J200FOJV2APJ1
CP version: J200FXXU2API1
Product code: SM-J200FZKDTHR
Phone SN: R58H9575TFD
Unique number: C8G011668304293
Reading IMEI… ok
IMEI: 352940082623795 (SIGN: OK)
IMEI 2: 352941082623793 (SIGN: OK)
Reading data from phone… error (0)
Try downgrade modem if possible

Done with Samsung Tool PRO v.27.1