By following the steps outlined above—disabling signature enforcement, manually installing via Device Manager, and using the correct flashing tools—you can conquer the CM2 driver. While Coolsand as a company may have faded, the hardware lives on, and so must the knowledge to support it.
As of 2025, Coolsand chipsets are obsolete. No new devices use them, and no official driver updates will ever be released. The only place you will encounter this driver is in legacy repair shops, vintage phone collectors' labs, or embedded system museums. However, as long as Windows maintains backward compatibility (via legacy VCOM support), the driver will continue to function.