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SMS

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Short Message Service, commonly known as SMS, is a text messaging component used in most telephone and mobile device systems.

Party SMS
Party SMS

It uses standardized communication protocols to allow mobile phones to exchange short text messages. These messages are typically transmitted over cellular networks. While it started as a way for carriers to send alerts to customers, it has become a global method for personal and commercial communication. Today, SMS is supported on modern networks, including 5G technology. It even works across different systems, such as computers and landlines, through the use of SMS gateways and a Short Message Service Centre (SMSC).

The mechanism of SMS is quite clever because it uses existing resources. Engineers designed SMS to travel along the signaling paths used to control telephone traffic. In a cellular network, signaling paths are necessary to manage calls, but they are often unused during periods of no activity. By transporting messages through these empty spaces, the system can move data at a minimal cost. To ensure these messages fit into the existing signaling formats, the length was limited. Initially, messages were restricted to 128 bytes. This was later improved to allow for 160 seven-bit characters. Friedhelm Hillebrand, one of the creators, chose this 160-character limit after observing the typical lengths of postcards and Telex messages.

There are different ways a message can be handled within the network. One type is Short Message Mobile-Terminated (SMS-MT), which is a point-to-point service where the network transmits a message to a mobile phone. This can be done by a person or a software application. Another type is Short Message Mobile-Originated (SMS-MO), which is the ability of a network to transmit a message that was sent from a mobile phone. There is also a third type called cell broadcast. These different methods allow for both direct person-to-person texting and automated system alerts.

The history of SMS began with radio telegraphy and radio memo pagers. The formal development of the SMS concept occurred in 1984 through Franco-German cooperation. Friedhelm Hillebrand and Bernard Ghillebaert developed the idea within the Global System for Mobile Communications (GSM) framework. In 1985, a proposal for SMS was presented during a GSM group meeting in Oslo, Norway. Later, a drafting group led by Finn Trosby established the technical design. The very first SMS message was sent on December 3, 1992. Neil Papworth, a test engineer, sent the message "Merry Christmas" from a computer to Richard Jarvis, who received it on an Orbitel 901 phone.

SMS saw massive growth in adoption across the globe. In 1995, the average user sent only 0.4 messages per month. However, by the end of 2000, that average reached 35 messages per user per month. By the end of 2010, SMS was the most widely used data application in the world. It had an estimated 3.5 billion active users, which represented about 80% of all mobile phone subscribers. The scale of usage is enormous; in 2002, 366 billion messages were sent globally. By 2010, that number had climbed to 6.1 trillion messages per year.

SMS messages sent monthly in USA (in billions)
SMS messages sent monthly in USA (in billions)

The service has many different uses beyond simple chatting. It is a major commercial tool used for mobile marketing and mobile banking. Many people use it for two-factor authentication to secure their digital accounts. It is also used for televoting and other types of commercial content. The popularity of the service even led to the creation of "SMS language," where people shorten words to fit the 160-character limit. Later, the Multimedia Messaging Service (MMS) was introduced as an upgrade to allow for picture and video messaging.

While SMS is still vital, it faces new challenges in the modern era. Many people now use Internet Protocol-based instant messaging services like WhatsApp, Telegram, or WeChat. These newer services run independently from mobile network operators. However, SMS remains a unique standard because it can provide cross-platform messaging that works across different types of devices and networks. As the industry moves forward, a new standard called RCS is being designated as the potential open successor to SMS.

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File:Party SMS.jpg
Party SMS.jpg
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Telephone-keypad.svg
File:SMS messages sent monthly in USA (in billions).svg
SMS messages sent monthly in USA (in billions).svg
File:Landline text messaging.JPG
Landline text messaging.JPG
File:SMS Phishing Attack Example.jpg
SMS Phishing Attack Example.jpg
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