Why do I need to unbind port?

When you flash multiple iDevices using 3uTools, 3uTools will bind the USB port automatically and display it in a fixed row position after you connect an iDevice to PC using the USB cable. If you want to adjust a port’s row position in the list, you may click “Unbind Port” and then reconnect the iDevice.

If a port is unbound, it won’t be displayed in the list when it is no iDevice connected to; if you unplug iDevice while a port is bound, this USB port will continue to be displayed in the list.