Once the drivers are installed, you must boot the phone into its specific download/boot state for the PC to assign the correct virtual COM port. Power off the Samsung B310E completely.
Click , navigate to your extracted Spreadtrum driver folder, and select the subfolder matching your OS version. samsung b310e usb driver gsmforum
If the executable installer fails, force the installation manually: Once the drivers are installed, you must boot
To ensure your software can communicate with the phone, keep the phone connected in boot mode and check your computer's configuration: Once the drivers are installed
The GSMForum driver specifically targets Download Mode . If your phone is on, the driver will not engage. Always power off the device completely before starting.