What SIM does stand for? It means subscriber identity module or subscriber identification module. The first SIM card in the world was developed in 1991 by the German company Giesecke & Devrient. They sold 300 SIM cards to Radiolinja, a Finnish wireless network operator. In 1992, they sold the first GSM mobile phone with a SIM card; it was a Nokia 1101. Today, it’s hard to find a person who’s never used a SIM card – over 7 billion gadgets around the world use them to make calls, send SMS and surf the web.
Why do I need a SIM card? Can my phone work without a SIM card? How does a SIM card work? Can someone track my location with the help of a SIM card? Do SIM cards break? Why are SIM cards getting smaller? The future of SIM cards