Bulk SMS Software - Multi USB Modem Screenshots Click on 'USB Modems Connection Wizard' button to connect USB modems to software. Connected device information is displayed on software screen. Select Com Port from connected device list and click on 'Use Selected Device to Send SMS' option. Add phone numbers and messages and click on Send button to send messages. You can also use software advanced features to send SMS such as Quota Management, Delayed Delivery option, Retry attempts on failed SMS, Exclusion list wizard, save sent items, support entire unicode charaters etc. SMS sending is in progress. View current running status of messages sending process. After sending messages you can view the sent items details.