Avoid using USB hubs. Plug the cable directly into a motherboard port (on the back of a desktop) or a different side of your laptop. Update Manually: Right-click Start > Device Manager . Find the "Samsung Android Modem" entry. Right-click and select Update driver .
You can identify your device’s true modem driver with: samsung android modem device driver -mss ver.3-
echo 0 > /sys/devices/platform/modem/powersave Avoid using USB hubs