SIM card

American  

[sim] / sɪm /

noun

1. 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.

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SIM Card British  

acronym

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

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Etymology

Origin of SIM card

First recorded in 1990–95

Example Sentences

The hackers likely executed a “SIM swap,” tricking a mobile provider into transferring a phone number to a SIM card the hackers control.

From The Wall Street Journal • Dec. 23, 2025

Astrologers consult a national zodiac, palm readers ring pagodas, would-be alchemists attempt to transmute mercury into gold and SIM card companies advertise dial-a-diviners.

From Barron's • Dec. 21, 2025

It will only operate with an eSIM - which allows users to switch networks or plans without resorting to a fiddly fork to open a tiny SIM card tray.

From BBC • Sep. 12, 2025

Until now, security vulnerabilities have been studied using 'account access graphs', which shows the phone, the SIM card, the Apps, and the security features that limit each stage of access.

From Science Daily • Jan. 22, 2024

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