MMS (Multimedia Messaging Service) Question:

Enhanced Messaging Service (EMS), is a cross-industry collaboration between Samsung, Ericsson, Motorola, Siemens and Alcatel, among others. It is an application-level extension to Short Message Service (SMS) for cellular phones available on GSM, TDMA and CDMA networks.

EMS is an intermediate technology, between SMS and MMS, providing some of the features of MMS. EMS is a technology that is designed to work with existing networks, but may ultimately be made obsolete by MMS.