SC-02G after unlock still locked

Hello z3x team and guys. I have samsung SC-02G, want to unlock,
but I have error:

Operation: Unlock
Selected model: SC-02G
Selected port: COM153 SAMSUNG Mobile USB Serial Port
Software version: 31.5.1

Reading phone info...
Reading IMEI... OK
IMEI: 354057060xxxxx
Unlocking... error (02)

Done with Samsung Tool PRO v.31.5.1

Operation: Unlock
Selected model: SC-02G
Selected port: COM153 SAMSUNG Mobile USB Serial Port
Software version: 25.3

Reading phone info...
Reading IMEI... OK
IMEI: 354057060898915
Unlocking... OK
Reseting... OK
Unlock done

Done with Samsung Tool PRO v.25.3

but still locked