Coolsand | Rda Imei Repair Tool New

| Feature | Old Coolsand RDA Tool (v1.x) | New Coolsand RDA Tool (v3.x+) | |---------|------------------------------|-------------------------------| | Windows 11 Support | No (frequent BSOD) | Yes (fully compatible) | | Automatic Driver Fix | Manual INF install | One-click installer | | Dual IMEI Repair | Separate operations | Simultaneous | | NVRAM Backup | Optional / error-prone | Automatic & verified | | IMEI Checksum Check | No | Yes (real-time) | | Chipset Support | RDA 85xx only | RDA, Spreadtrum, Unisoc (partial) | | Interface | Command-line hybrid | Full GUI with progress bar |

| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | "No Device Found" | Driver not installed or phone not in META mode | Reinstall drivers; try a different USB port (USB 2.0 preferred) | | "Write Failed at Address 0x..." | NVRAM write protection | Use the "Force Write" option (if available) or flash a clean PAC firmware first | | "IMEI Invalid Checksum" | Typo or wrong IMEI | Use the built-in IMEI validator to auto-correct the checksum | | "Device Disconnected During Write" | Loose USB cable or power interruption | Use a shorter, shielded USB cable; disable USB selective suspend in Windows power options | | "Permission Denied" | Tool not run as admin | Right-click the .exe and select "Run as Administrator" | coolsand rda imei repair tool new

: Some keypad phones allow IMEI repair via dialer codes like | Feature | Old Coolsand RDA Tool (v1