Before downloading the driver, prepare your environment:
The MT6261 USB driver is . It requires manual intervention, driver signature bypass, and precise timing. Even experienced embedded engineers often struggle with it because:
MT6261 enters Preloader mode for ~5 seconds, then reboots to normal. To flash, you must click “Download” in SP Flash Tool before plugging the device in, or precisely during those 5 seconds. This is called “timing the handshake.”
These are — the MT6261 does not typically implement standard USB classes like CDC ACM without MediaTek’s proprietary protocol layer.