Download and install the RDA/Coolsand USB Drivers on your computer. Restart the PC after installation to ensure drivers load correctly.
This tool does NOT work on 4G smartphones, UNISOC SC series, or Qualcomm devices. Attempting to use it on unsupported hardware will fail or brick the device.
In many regions, changing a mobile device's IMEI is illegal unless you are restoring the original number provided by the manufacturer. Always back up your phone's firmware before attempting these procedures, as they can permanently damage the device.
These tools address scenarios where a device's IMEI has become "invalid" or "null" due to software corruption, often resulting from improper flashing or botched rooting. Restoration