mms greeting - Multimedia Messaging Service (MMS) is a standard for a telephony messaging systems that allow sending messages that includes multimedia objects (images, audio, video, rich text) and not just text messages as in Short message service (SMS). It is mainly deployed in cellular networks along with other messaging systems like SMS, Mobile Instant Messaging and Mobile E-Mail. Its main standardization effort is done by 3GPP, 3GPP2 and Open Mobile Alliance (OMA).