When the User Account Control (UAC) security prompt appears, click to confirm permissions.
Once the installation finishes, keep your device connected and check the Device Manager interface. Under the section, you should now see a clean entry labeled: RDA USB VCOM Port (COMx) or SciU2S Serial Port (COMx)
Before proceeding, understand the obstacles:
The driver is also referred to under names such as RDA USB Driver for gallite 8809 or simply Coolsand RDA driver , and it is required by popular repair tools like Infinity‑Box CM2 RDA and Multi IEdownload Tool. coolsand rda usb driver 64-bit windows 10
This often indicates a driver conflict or power issue.
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Right-click the Windows Start button and select . When the User Account Control (UAC) security prompt
Because many Coolsand RDA drivers are older and lack updated digital signatures from Microsoft, Windows 10 64-bit will block them by default. You must temporarily disable Driver Signature Enforcement to install them.
Legacy Coolsand drivers rarely feature an automated executable setup wizard. Manual installation via the Windows Device Manager is the most reliable method. Part A: Connecting the Device in Boot Mode Power off your Coolsand/RDA device completely. Remove and reinsert the battery (if removable).
Most modern 64-bit Windows systems require a manual installation process if the automatic detection fails. This often indicates a driver conflict or power issue
Official support for these legacy Chinese SoCs died before Cortana was born. Modern Windows blocks unsigned drivers. But where there's an old phone, there's a way.
Once you have the driver files ready on your computer, follow these steps to install the driver on Windows 10. The easiest method is to use the provided installer.
| Issue | Likely Cause | Fix | |-------|---------------|------| | Driver installs but disappears after reboot | Test Mode disabled | Re-enable and reinstall | | Yellow exclamation, Code 52 | Windows still blocking signature | Use pnputil to force: pnputil /add-driver rdadriver.inf /install | | Phone not detected at all | Bad USB cable or wrong phone mode | Try different USB port (USB 2.0 preferred) |
Windows 10 will now boot into a temporary mode that permits unsigned legacy driver installation. Step 2: Extract and Run the Coolsand RDA Setup Wizard