The end of the SIM tray
In 1991, a Munich company called Giesecke+Devrient shipped 300 credit-card-sized plastic chips to Finland, where a carrier called Radiolinja was about to launch the world’s first commercial GSM network. Each chip held a small processor and one piece of information worth more than the chip itself: who you were. They called it the Subscriber Identity Module, and it was no larger than a business card.
For the next two decades, the SIM spent most of its energy getting smaller. The Mini-SIM arrived in 1996; the Micro-SIM was standardized in 2003; the Nano-SIM was adopted in 2012. That last reduction was a fight. Apple submitted a design to ETSI, the European standards body, that was thinner than the competing proposals from Nokia, Motorola, and RIM. Apple’s design won by a narrow committee vote, after Apple agreed to license its patents on fair and reasonable terms. It was the last time Apple would compete in a physical SIM format, because it was already working on a way to eliminate the physical card entirely.
What the chip did was straightforward. At power-on, it presented your International Mobile Subscriber Identity to the network, proved it held the right cryptographic key, and the network let you in. Calls went through; the account was billed. The SIM was not the phone — it was your identity in plastic, something you could slide from one handset to another. This portability was the design intent from day one, though American carriers spent twenty years building handset locks to defeat it. They lost, eventually, to the FCC.
In September 2022, Apple removed the SIM tray from every iPhone 14 sold in the United States. No slot, no card. Your identity was now a file, delivered over the air via the GSMA’s eSIM standard, published in 2016. International iPhone 14 models kept the tray — Apple moved cautiously on carrier readiness outside the US — but the destination was visible from that announcement.
By 2026, the destination had arrived. Apple’s iPhone Air launched globally as eSIM-only, its ultrathin profile made possible partly by eliminating the slot that had held the chip for thirty years. Samsung’s Galaxy S26 dropped the physical tray in US models. Global eSIM connections reached 1.5 billion, up 30 percent in a year, with over half of all activations driven by travelers switching local plans on arrival. The physical SIM — 35 years old, four sizes, the standard cryptographic handshake of mobile civilization — was retired by software.
What eSIM made possible was what the SIM always enabled, but faster and without fumbling. Change carriers in settings. Add a travel plan in an airport app. The network still checks your identity; the card just doesn’t need to physically exist. Giesecke+Devrient’s Munich engineers shipped 300 chips in 1991 to prove a protocol. The protocol proved more durable than the medium.
Sources
- SIM card — Wikipedia — Giesecke+Devrient and Radiolinja as first SIM manufacturer and operator (1991); ETSI TS 11.11 specification; size evolution from 1FF to 4FF; nano-SIM adoption following Apple’s design proposal; eSIM standard introduced 2016.
- The End of Physical SIM Cards: Why 2026 Is the Tipping Point for eSIM — eSIMphony — 1.5 billion global eSIM connections in 2026 (30% growth); iPhone Air and Samsung Galaxy S26 going eSIM-only; travel activations representing over half of eSIM use.
- iPhone 14 eSIM-only US models — Saily — Apple’s September 2022 decision to remove the SIM tray from US iPhone 14 models; context on carrier readiness in different markets.