samsung N910t do not unlock

Micro-USB cable:
1. Phone must be powered on.
2. Type *#0808# and select ‘DM+MODEM+ADB’.
3. Type *#9090# and choose ‘DM/DUN over HSIC’ (ignore it, if it’s not available).
4. Reboot phone.
Or use ‘Activate Diag’ function from ‘Repair’ tab.
5. Connect USB cable, install drivers if needed.
6. Select Samsung diagnostic port in port settings.
7. Press ‘Unlock’ button for direct unlock.

Operation: Unlock
Selected model: SM-N910T
Selected port: COM19 SAMSUNG Mobile USB Serial Port
Software version: 23.9

Reading phone info…
Reading IMEI… OK
IMEI: 35*************
Unlocking… OK
Reseting… OK
Unlock done

but do not unlock
Done with Samsung Tool PRO v.23.9