Systems and methods are described for serving binary short message service (SMS) content to multiple mobile devices that use different wireless networks to receive data. One implementation involves a method for serving binary SMS content to the subscribers of a telematics service provider (TSP) on multiple mobile devices that are provisioned with multiple wireless networks. The method involves receiving a binary SMS at a receiving module of an external short message entity (ESME), translating the SMS into a protocol data unit (PDU), and routing the PDU to an SMS gateway producing application. The PDU is directed to a virtual serial port, which is created by the gateway producing application and mapped to a physical serial port at a terminal server. The PDU is sent from the terminal server to a data modem that is provisioned with a wireless carrier, and the data modem is instructed to transmit the SMS to a mobile device.