A universal message center operable to deliver messages over a Long Term Evolution, LTE, network, the universal message center comprising: a control system operable to receive a text message intended for a destination mobile device, to determine if the destination mobile device is LTE enabled, and to identify a IP address assigned to the destination mobile device in the LTE network responsive to a determination that the destination mobile device is LTE enabled; a delivery system operable to attempt to forward the text message to the destination mobile device over the LTE network based on the IP address; the delivery system is further operable to forward the text message to the destination mobile device over the LTE network using First Delivery Attempt, FDA, processing, wherein delivery of the message is attempted first before storing the message; and if a first delivery attempt fails using FDA processing, then the control system is further operable to identify a store-and-forward, SFD, message center for an originator of the text message, and to forward the text message to the SFD message center for SFD processing, wherein the SFD processing comprises delivering a message by first storing the message, and then initiating a delivery attempt for the message; wherein the control system is further operable to query a subscriber database that stores a subscriber profile for the destination mobile device to identify the IP address assigned to the destination mobile device; and the interface between the control system and the subscriber database is a Diameter Sh interface, and an attribute value pair, AVP, is defined in the Diameter Sh interface for the IP address. a control system operable to receive a text message intended for a destination mobile device, to determine if the destination mobile device is LTE enabled, and to identify a IP address assigned to the destination mobile device in the LTE network responsive to a determination that the destination mobile device is LTE enabled; a delivery system operable to attempt to forward the text message to the destination mobile device over the LTE network based on the IP address; the delivery system is further operable to forward the text message to the destination mobile device over the LTE network using First Delivery Attempt, FDA, processing, wherein delivery of the message is attempted first before storing the message; and if a first delivery attempt fails using FDA processing, then the control system is further operable to identify a store-and-forward, SFD, message center for an originator of the text message, and to forward the text message to the SFD message center for SFD processing, wherein the SFD processing comprises delivering a message by first storing the message, and then initiating a delivery attempt for the message; wherein the control system is further operable to query a subscriber database that stores a subscriber profile for the destination mobile device to identify the IP address assigned to the destination mobile device; and the interface between the control system and the subscriber database is a Diameter Sh interface, and an attribute value pair, AVP, is defined in the Diameter Sh interface for the IP address.