Table of Contents
SIM Full Form
The full form of SIM is “Subscriber Identity Module” or “Subscriber Identification Module“. SIM is an integrated circuit that securely stores International Mobile Subscriber Identity (IMSI). It is a portable memory chip that enables you to make phone calls or send text messages around the world where the subscriber’s network is available.
What is SIM card?
SIM card is commonly used in mobile phones which work on the GSM networks (CDMA phones generally do not use SIM cards.). It is portable so that users can use it with any supporting mobile phone. SIM card is a smart card that stores data for GSM cellular telephone customers. Such data includes user identity, phone numbers and locations, network authorization data, personal security keys, address books and archived text messages.
What are the sizes of SIM cards?
When the first SIM card was invented, it was roughly the size of a credit card. But the latest standard of SIM used to have a size of 15mm x 12mm. These days SIM cards come in three sizes:
- Standard SIM (15 x 25mm)
- Micro SIM (12 x 15mm)
- Nano SIM (8.8 x 12.3mm)
History
The first SIM card was created in 1991 by Munich-based smart card maker Giesecke and Devrient. This SIM was initially specified by the European Telecommunications Standards Institute. Today, SIM cards are ubiquitous, allowing more than 7 billion devices to be connected to cellular networks around the world.
Other full forms of SIM
| Full Form | Category |
|---|---|
| SIMulation / SIMulator | Language & Linguistics |
| Singapore Institute of Management | Universities & Institutions |
| Selected Ion Monitoring | Chemistry |
| Space Interferometry Mission | Space Science |
| Society for Information Management | Professional Associations |
| Systems Insight Manager | Software & Applications |
| Security Information Management | Security |
| Sudan Interior Mission | Religious Organizations |
| Studio for Interrelated Media | News & Media |
| Single Inline Memory | Hardware |
| Servicio de Inteligencia Militar [Military Intelligence Service] | Security & Defence |
| Servicio de Información Militar [Military Information Service] | Security & Defence |
| Service de sécurité Incendie de Montréal [Montreal Fire Safety Service] | Departments & Agencies |
| Scuola Italiana di Montevideo [Italian School of Montevideo] | Universities & Institutions |
| Servizio Informazioni Militare [Military Information Service] | Security & Defence |
| Super-Resolution Microscopy | Tech Terms |
| Serving In Mission | Religion |
| Source Independent Measurement | Electronics |
| Spatial Information Management | Software |
| School of International Management | International Business |
| Society for Industrial Microbiology | Human Genome |
| Secrets of Internet Millionaires | News & Media |
| Society for International Ministries | Organizations |
| Simple Integration Method | Mathematics |
| Strategy Intervention Model | Community |
| Strategic Instruction Model | General Business |
| Students In Mission | Universities |
| Servicio de Información Militar | Spanish |
| Service Information Message | General Computing |
| Support Interface Module | Hardware |
| Solar Irradiance Monitor | NASA |