How the mobile phone (that is off, but had been just plugged into USB) informs the Windows PC (with installed drivers "MediaTek PreLoader USB VCOM port" and "MediaTek USB Port") how to identify itself: as device - "MediaTek PreLoader USB VCOM port" or as - "MediaTek USB Port"?

When you plug in a MediaTek phone, it will turn on, but not fully on. The boot ROM will run, which will run the preloader, and depending on implementation, either show the charging animation or starts the Linux kernel and enters into a mode called kernel power-off charging (KPOC) that shows the charging animation. The devices you're seeing are associated with the first two stages. Both devices are used for downloading firmware to the phone, but they represent different stages and support different command sets. MediaTek USB Port is created by the boot ROM, and MediaTek PreLoader USB VCOM port is created by the preloader (it runs after the boot ROM and does further hardware initialization).

Mediatek Preloader Usb Vcom Port Driver Windows 7 17

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MTK preloader driver is software that allows your computer to detect and install MTK devices. It is used to update Android device firmware. It is necessary to enable USB debugging before installing this tool.

In the Advanced Boot Options, use the arrow keys to select Disable Driver Signature Enforcement. After that, you should click Device Manager to find the latest version of the MTK preloader. Then, install the SP flash tool on your PC to install the latest MTK drivers on your phone. 800a06b249