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SIM card

American

[sim] / sɪm /

noun

Subscriber Identity/Identification Module: a removable card inside a cell phone that stores data unique to the user, as an identification number, passwords, phone numbers, and messages.

SIM Card British

acronym

subscriber identity module card; a small card used in a mobile phone to store data about the network, telephone number, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of SIM card

First recorded in 1990–95

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

She plans to "buy another SIM card to download Max on another phone."

From Barron's • Mar. 23, 2026

The Oslo transport authority, Ruter, said the bus’s mobile-network connection via a Romanian SIM card gave manufacturer Yutong access to the control system for battery and power supply.

From The Wall Street Journal • Nov. 19, 2025

The surgeon then inserts a microchip shaped like a SIM card, only 2mm by 2mm, beneath the central retina through a small opening.

From Science Daily • Oct. 20, 2025

With smartphones, where Apple leads others often follow - so it launching an iPhone this week without a traditional SIM card is raising questions over the future of a very familiar piece of phone tech.

From BBC • Sep. 12, 2025

Many countries will allow you to purchase a pre-paid SIM card for service after you arrive in-country for use with your existing smartphone or another you buy abroad.

From Salon • Mar. 29, 2019

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023