: The driver manifests as a "MediaTek Preloader USB VCOM Port" in Windows Device Manager.
: A transient state (usually lasting only a few seconds) when the device is first plugged in while powered off. mt65xx preloader driver
However, the Preloader has a dual personality. When the phone is turned off and connected to a PC via USB, the Preloader acts as the . : The driver manifests as a "MediaTek Preloader