This usually means the device is not in Diag Mode. Try holding a different combination of volume keys when connecting.

Manually type the 15-digit IMEI found on the device's original box or battery compartment.

Support for multiple modes (Normal, Calibration, and Diag).

Click "Start" or "Write" and wait for the "Pass" notification. ⚠️ Important Safety Precautions

Ensure the SPD/Unisoc USB drivers are installed on your PC.

Standard IMEI writing on feature phones and basic smartphones. 2. Research Download Tool (Latest Version)