What Is SMS Bomber? Cellular phones use a Short Message Service, or SMS, to send text messages. Although most of us are used to sending one unique message at a time, there are a variety of services available that can dramatically increase the speed and frequency of your texting. An SMS bomber is a software program that duplicates the same message multiple times and sends all the messages to a designated recipient. You download the software online and send the SMS bombs using your phone's text-messaging functionality.