What is SMS (Short Messaging Service) - Definition?

SMS is the short form of SHORT MESSAGING SERVICE. It lets users send and receive text messages between mobile phones. SMS can be of up to 160 characters long. SMS is sent over mobile network and all mobile phone supports SMS. It uses standard communications protocols. It can also users using different mobile networks.

Since its introduction, mobile phones manufacturers have been trying to improve it. Recent SMS offers threaded messaging like UI and support to emoticons. 

SMS was most popular before internet based instant messaging apps took over the business. 

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