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Multimedia Messaging Service, or MMS, is a standard way to send messages that include multimedia content to and from mobile phones.
Short Message Service SMS capability that allowed exchange of text messages only up to 160 characters in length.
General Packet Radio Service or GPRS is a non-voice service added to existing TDMA networks, one of the 2.5G technology upgrades. TDMA is the underlying transport mechanism used by GSM networks. GPRS provides the transmission of IP packets over existing cellular networks.