Hi,
For Mediatek device (depend on the mobile state), after sending DA the USB connection to the phone can be at full-speed, and by default we're always set it to High-speed to achieve faster flashing process. but in some rare case, switching to USB HS may failed. This will abort next command so flashing will failed.
In this case you may have to un-check the "Switch To USB HS" so flashing will still work but at slow speed.
Hope that helps.
