![]() ![]() ![]() It's also possible that there is some sort of issue with the preloader that causes the phone to reset back to boot ROM to start an emergency download mode. Usually, only the preloader device would show up upon plugging the phone in, but it seems in your case the phone might be configured to enter the boot ROM's download mode, and if it doesn't see a connection, to continue into the preloader, which will offer another download mode. 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). Right click on the hardware device you wish to update and choose Update Driver Software. ![]() Both devices are used for downloading firmware to the phone, but they represent different stages and support different command sets. Go to Device Manager (right click on My Computer, choose Manage and then find Device Manager in the left panel), or right click on Start Menu for Windows 10 and select Device Manager. Drivers are the property and the responsibility of. The devices you're seeing are associated with the first two stages. The agent utility uses data collection technology to conveniently update multiple PC drivers. 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. When you plug in a MediaTek phone, it will turn on, but not fully on. ![]()
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