This is a standalone tool but is harder to find for older chips.
| Error Message | Solution |
|---------------|----------|
| “No device found” | Reinstall SPD drivers; try a different USB port; enable Diag mode via *#*#83781#*#* → MTLK Serial. |
| “Write failed – NVRAM locked” | Use the “Unlock NVRAM” button first (some tools have it). |
| “Checksum mismatch” | Your tool is outdated; download the new SC7715 IMEI Tool version 3.6+. |
| “IMEI still null after write” | Flash the full stock firmware with ResearchDownload, then use the IMEI tool again. |
| Tool crashes on launch | Install .NET Framework 3.5 and VC++ Redistributables. | sc7715 imei tool download new
Q1: Is the SC7715 IMEI Tool free?
Yes, the new version is released for free by the GSM community. This is a standalone tool but is harder
Q2: Will this tool work on SC7731 or SC9830?
No. Those chips require their own tools, though some universal Unisoc writers may work. | Error Message | Solution | |---------------|----------| |
Q3: My phone is not detected even after drivers. What now?
Try a different cable. Also, manually install the driver from Device Manager → Unknown device → Update driver → Browse my computer → Let me pick → SPRD Serial Driver.
Q4: Can I change my IMEI permanently?
Yes, the change persists after reboot until you flash the firmware again.
Q5: The tool says “new version required”. Where to get it?
Download the exact “SC7715 IMEI Tool new” as mentioned above – older 2016 tools no longer work on modern Windows or later firmware revisions.