How to Enable ADB (USB debugging) ?
  1. Once the setup wizard is done and you’re on your device’s home screen
  2. Go to Settings, Go to “About device” 
  3. Click the “Build number” field 7 times. This will turn on “Developer options”
  4. Go back to Settings
  5. Go to “Developer options”
  6. Scroll down and enable “USB debugging”