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If you are determined to find a working download, you verify the file against these criteria:
Extract the RDA USB Driver folder and run the installer to ensure your PC detects the phone. coolsand rda flash tool link
This is almost always a driver or connection issue. Ensure you have installed the correct RDA Coolsand USB driver. Also, try a different USB cable and port. Finally, ensure the device is in the correct mode by dialing *#3696# after connecting the USB cable. If you are determined to find a working
Locate the RDA Flash Tool.exe file. Right-click and select "Run as Administrator" . several resources can provide support:
If you encounter issues while using the Coolsand RDA Flash Tool, several resources can provide support: