Short Message Service
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| Short Message Service | |
|---|---|
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| Name | Short Message Service |
| Abbreviation | SMS |
| Introduced | 1992 |
| Developer | GSM Association; CETECOM; ETSI |
| Industry | Telecommunications; Mobile phone services |
| Operating system | GSM; UMTS; LTE; 5G NR |
Short Message Service is a telecommunications protocol for sending short text messages between mobile devices, introduced in 1992 and standardized within the Global System for Mobile Communications ecosystem. It evolved through contributions from standards bodies and corporations including European Telecommunications Standards Institute, GSM Association, Motorola, Nokia, and Ericsson. SMS underpinned early mobile data services and influenced developments such as Multimedia Messaging Service, Rich Communication Services, Short Message Peer-to-Peer Protocol, and mobile application ecosystems associated with Apple Inc. and Google LLC.
History
SMS originated as part of the GSM standardization work led by engineers connected to Friedhelm Hillebrand and Sema Group. Early trials involved companies like Telenor, Vodafone, and Deutsche Telekom. The first commercial person-to-person SMS was sent by an engineer at Vodafone in 1992, while mass adoption accelerated with handset models from Nokia and Motorola and carrier rollouts by Telstra and Orange S.A.. Global milestones include SMS-based voting during Eurovision Song Contest events, marketing campaigns by Coca-Cola, emergency alert systems following incidents involving FEMA and public safety programs in countries such as Japan and India. Influential legal and regulatory moments involved agencies like the Federal Communications Commission and directives from the European Commission.
Technology and Standards
SMS is specified in standards maintained by 3GPP and ETSI and uses signaling channels within the GSM architecture such as the SS7 network. Protocol elements reference specifications like TS 23.040 and 3GPP TS 23.038. Implementations interact with infrastructure vendors such as Huawei Technologies, Nokia Siemens Networks, Ericsson and rely on interconnect standards embraced by carriers including AT&T, Verizon Communications, Deutsche Telekom, and China Mobile. Related protocols include SMPP, Short Message Peer-to-Peer Protocol, MAP within SS7, and newer IP-based messaging stacks driven by GSMA initiatives toward Rich Communication Services under the stewardship of organizations such as Omaf and Open Mobile Alliance. Evolution toward LTE and 5G NR introduced integration points with IP Multimedia Subsystem and signaling gateways from vendors like Cisco Systems and Juniper Networks.
Message Features and Formats
SMS messages typically carry payloads up to 160 7-bit characters per message using GSM 03.38 alphabet, with extended encodings via UCS-2 for non-Latin scripts supported in standards adopted by regional handset makers like Samsung and Sony. Concatenated SMS uses User Data Header fields defined in 3GPP to link segments. Binary SMS is used for configuration and provisioning by manufacturers such as HTC and BlackBerry Limited; WAP Push messages employed by firms like Nokia delivered URLs to browser clients. Message formats interact with value-added services provided by platform companies like Twilio, Sinch, Infobip and enterprise systems from Salesforce and Zendesk.
Network Architecture and Delivery
Delivery relies on components including the Short Message Service Center, home location registers like HLR, visitor location registers such as VLR, and signaling networks provided by incumbents including Telstra and Orange S.A.. Inter-carrier routing traverses gateways and interconnect agreements among operators like T-Mobile US and Sprint Corporation. SMS delivery semantics vary by implementation in networks operated by China Unicom, Reliance Jio, and MVNOs like TracFone Wireless. Store-and-forward behavior and retry mechanisms interact with billing systems developed by firms such as Amdocs and Ericsson Business Support Systems. International routing implicates clearinghouses and global aggregators including Syniverse and BICS.
Usage, Adoption, and Economics
SMS drove carrier revenue models for voice and data services used by consumers of devices from Apple Inc. and Samsung Electronics and enterprises like Amazon.com and eBay for transactional notifications. Adoption patterns varied across markets: early ubiquity in United Kingdom and Finland contrasted with later growth in India and Nigeria. Pricing strategies by operators such as Vodafone Group and Verizon Communications ranged from per-message billing to unlimited bundles and wholesale resale through aggregators like Tyntec. Regulatory decisions by authorities including the Federal Trade Commission influenced commercial messaging ecosystems, and economic externalities prompted competition from over-the-top services by WhatsApp, Facebook Messenger, WeChat, and LINE.
Security, Privacy, and Regulation
SMS security limitations emerged in threat analyses by researchers at institutions like MIT and University of California, Berkeley showing vulnerabilities in SS7 and SMS spoofing exploited by actors such as cybercrime syndicates observed by Europol and FBI. Two-factor authentication practices by Microsoft and Google LLC utilized SMS despite recommendations from NIST and security firms like Kaspersky to prefer app-based authenticators. Privacy concerns led to regulatory interventions by ICO and rulings in jurisdictions influenced by GDPR and national laws in Australia and Canada governing consent, spam, and robocall mitigation. Lawful intercept capabilities engaged vendors certified under standards from ETSI and oversight from courts in countries like France and United States.
Applications and Impact on Society
SMS enabled innovations in mobile banking by providers like M-Pesa and Bank of America, public health messaging coordinated by WHO and UNICEF, and civic engagement through platforms used during elections in Kenya and Philippines. It reshaped media and entertainment via voting on programs such as Big Brother and influenced crisis communication during events like the 2011 Tōhoku earthquake and tsunami and public safety alerts coordinated by FEMA. Cultural and economic effects touched startups incubated through accelerators affiliated with Y Combinator and business models of firms like SMSGlobal and Textlocal.