Once you've downloaded the driver package, follow these steps to install the SPRD U2S Diag driver:
What (e.g., ResearchDownload, CM2, Pandora) are you trying to use?
If the device still shows errors, use the "Add legacy hardware" option in Device Manager and manually point to the sprdvcom.inf Sprd U2s Diag Driver For Windows 10 64 Bit
As of 2025, Unisoc (formerly Spreadtrum) has improved its driver signing. Newer chips (Unisoc Tiger T606, T618, etc.) use class drivers that are WHQL-signed. If you have a newer device, look for "Unisoc USB Diag Port" rather than "SPRD U2S." The legacy SPRD U2S name is still used for older chips like SC7731, SC9832, SC9850, and SC9863.
The SPRD U2S Diag driver is a USB communication driver developed for Spreadtrum (now part of Unisoc Communications Inc.) chipsets. It serves as the bridge between your Windows PC and a Spreadtrum-powered Android device when the device is in diagnostic (DIAG) mode. Once you've downloaded the driver package, follow these
Since Spreadtrum (now UNISOC) is an OEM chip manufacturer, drivers are often bundled with device-specific support packages. You can find high-rated versions from these sources: UNISOC Communications Inc. (Version 4.21):
For the average Windows 10 64-bit user: . The security risks and potential for bricking far outweigh any benefit. If you find a “guide” requiring you to disable driver signature enforcement for a phone repair, proceed with extreme caution—preferably on an isolated, offline machine with no personal data. If you have a newer device, look for
The SPRD U2S Diag Driver for Windows 10 64-bit plays a crucial role in enabling diagnostic and repair functionalities for Spreadtrum-based devices. Its development and maintenance require careful consideration of compatibility, security, and performance to meet the needs of device manufacturers and repair services. As technology continues to evolve, the role of such drivers will remain vital in ensuring the smooth operation and maintenance of complex electronic devices.
The Sprd U2s Diag (Spreadtrum USB to Serial Diagnostic) driver is a dedicated software component. It allows Windows to communicate with the Diagnostic (Diag) port of devices running on Spreadtrum / Unisoc chipsets.
Disable driver signature enforcement as described earlier. If you already attempted this, ensure you did not restart the computer between disabling the feature and installing the driver. The feature must be disabled in the same boot session.
Even after disabling signature enforcement, some antivirus programs flag low-level diagnostic drivers as false positives.