Sprd U25 Diag Driver Work __top__ <8K>

Most Spreadtrum Diag drivers are unsigned, so Windows blocks them by default.

Most U25 devices do not expose diag by default. You must enable it via engineering mode or ADB:

: Enables diagnostic tools to perform low-level testing and system management.

: When a device with the SPRD U25 SoC is connected to a computer or other diagnostic equipment via a USB cable, the diag driver is initialized.

For the driver to function, it must match your Windows architecture (32-bit or 64-bit) and the specific hardware ID of your device.

sudo modprobe -r qcserial sudo modprobe option