openwrt u8300 LTE model

21-u8300

#!/bin/sh

U8300_PROID="1c9e/9b05/232"

if [ "${PRODUCT}" = "${U8300_PROID}" ]; then
        if [ "${ACTION}" = "add" ]; then
                #register usbserial and option device driver with the modem mode id:
                echo '1c9e 9b05 ff' > /sys/bus/usb-serial/drivers/option1/new_id
                logger -t HOTPLUG "${U8300_PROID} plugged in."

        fi
        if [ "${ACTION}" = "remove" ]; then
                logger -t HOTPLUG "${U8300_PROID} was removed."
        fi
fi