Windows assigned a high COM port number (e.g., COM27). Fix: Miracle Box sometimes only scans COM1–COM16.
: Ensure you are using a high-quality data cable, as some charging-only cables will not transmit the data required for flashing.
Re-run the steps to disable Driver Signature Enforcement. Ensure you do not restart your computer normally before finishing the driver installation process. Device Connects and Immediately Disconnects coolsand usb driver for miracle box
Follow these steps to manually install the driver using the Windows Device Manager, which is the most reliable method for legacy hardware communication. Step 1: Download and Extract the Driver Package
Coolsand (often associated with RDA Microelectronics) manufactures low-cost chipsets primarily found in budget feature phones, basic Android devices, and smartwatches. Because these processors utilize unique boot architectures, your Windows operating system cannot communicate with them natively. Windows assigned a high COM port number (e
Error. The hash for the file is not present in the specified catalog file.
, the phone appears in Windows Device Manager under "Ports (COM & LPT)" as something like Coolsand USB Port (COM3) , allowing Miracle Box to take control. Re-run the steps to disable Driver Signature Enforcement
Right-click it, select , then choose Browse my computer for drivers .
Press or F7 to choose "Disable driver signature enforcement". Step 2: Install Drivers via Device Manager
