Download CM2SP2 Diag Helper Tool V1.04
.a tool or software that is used to troubleshoot and reset devices that use SPD (Spreadtrum) chipsets, specifically in the case of DIAG/SVC mode failure. The tool may also have the ability to wipe user data and reset security codes on the device. Additionally, it is mentioned that a dongle is not required to use the tool and that it is available for free.
Use it in case of DIAG/SVC mode failure with latest SPD devices.
Wipe, User Data and Security Code Reset: several types of devices handling improved
Dongle is not required, just run and use for free