Methods for appending additional device, location, and/or presence information to a mobile-originated short message are taught herein. One such method for appending additional device information includes receiving a MO short message at a message center. The MO short message includes a content request. The message center sends a query to a subscriber directory for device information corresponding to the device of the requesting subscriber. The subscriber directory searches for the device information and generates a response to be sent to the message center, the response including the device information. The subscriber directory sends the response to the message center, which appends the device information to the MO short message. The message center then sends the short message to the destination, for example, a content provider. Methods for appending location and/or presence information are also taught.