USB hotplug script add Option driver. You can edit `/etc/hotplug.d/usb/50-fm350_driver` to use Generic driver.
Support dual stack and received SMS will be stored in `/tmp/sms/rx` folder and the full path is sent to `/usr/bin/atc_rx_sms.sh <full path>`. `atc_rx_sms.sh` is not included in the package.