Simmax Usb Serial Sim Card Reader Software Driver .rar -

Try plugging the reader into a different USB port, preferably a USB 2.0 port rather than USB 3.0, as older hardware can have compatibility issues with newer ports.

This often happens if the reader is not properly recognized or the SIM card is not seated properly. Try plugging into a USB 2.0 port rather than USB 3.0. Simmax USB Serial Sim Card Reader Software Driver .rar