Leo followed the PDF like a sacred scroll. Step 12 was the key: “On the DOOGEE S100, go to Settings → System → Developer Options → USB Configuration → Select ‘File Transfer / Android Debug Bridge (ADB).’ Then, connect the USB cable to a USB 2.0 port (not 3.0).”
He did it. Windows made the soft ding-dong of connection. Then, the “Found New Hardware” wizard popped up: “MediaTek PreLoader USB VCOM Port.” DOOGEE S100 Drivers Download
with a yellow triangle that turned into a green checkmark. Leo followed the PDF like a sacred scroll