Samsung J320f unlock Done by z3x without root

Samsung z3x tool pro v25.0 Download
Support SM-G361F/G531h/j110g/J200GU and others new model
  
  UNLOCK INSTRUCTIONS:
  1. Power on the phone.
  2. Tap 7 times on 'Build number' in 'Settings'-'About phone' to 
      enable 'Developer options',
      go to 'Settings'-'Developer options' and enable 'USB debugging'.
  3. Connect the phone to PC with USB cable, install drivers if 
      needed.
  4. Press 'Read codes' to read security codes.