Accidental formatting of the NVRAM partition during servicing. Legal and Regulatory Compliance Notice
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
If the Coolsand RDA repair tool fails or is unavailable, or if you are working on a modern Mediatek (MTK) device, here are some well-regarded alternatives: If the Coolsand RDA repair tool fails or
No installation is usually required (Portable .exe). Download and install the RDA USB Driver package
For modern Unisoc phones (SC9832, SC9863, Tiger T310), you must use newer tools like or ResearchDownload .
Without the proper USB drivers, your computer will not detect the device in its special boot state. Download and install the RDA USB Driver package for your specific Windows architecture (x86 or x64). Step 2: Open the Repair Software