If your phone shows or MediaTek USB Port (Preloader) only briefly:
: Use the volume keys to navigate to "Wipe data/factory reset" and press Power to confirm. Confirm : Select "Factory data reset" . How to Unbrick INFINIX Note 30 Pro
Why? Because MediaTek’s BootROM is burned into the silicon. It is the first thing that wakes up. As long as that chip has power, you can always flash a new ROM. If your phone shows or MediaTek USB Port