A1: While some legacy tools claim to offer dongle-free functionality, most modern RDA and Coolsand devices require a dedicated hardware dongle (such as the Infinity CM2 Dongle) for reliable IMEI repair. The CM2 RDA Tool itself requires the CM2 Box or Dongle to function.
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In some cases, IMEI repair alone may not resolve network issues, especially if the device’s calibration data or RF (radio frequency) parameters are corrupted. After IMEI repair, perform a factory reset or use the “Format FS” (Format File System) option within the CM2 RDA Tool to clear any residual NV data corruption. coolsand rda imei repair tool