Ensure you are using a high-quality USB cable and try different ports (preferably USB 2.0) on your PC.
filter driver. This is often required to "catch" the device in Brom mode before it switches to charging. MTK USB Drivers : Ensure you have the latest MediaTek Preloader Drivers installed. Without these, the COM port will not trigger. Cable Check mtk module ver 158 download fix
.inf from the MTK_Driver_Auto_Installer folder.install.bat as administrator – do not manually pick drivers from Device Manager.