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Contents: MMS vs SMS. Definitions. SMS is the abbreviation for Short Message Service and is the text communication service component of a phone or mobile communication system, using standardized communications protocols that allow the exchange of short text messages between fixed line or mobile phone devices.
In the phrase SMS messaging, SMS stands for short message service.. SMS is a means of sending text between mobile phones, and it can also be used to send text from a computer or tablet to a mobile phone. Only 160 characters are allowed in an SMS message. Full Answer >.