SIM stands for “ Subscriber Identity Module,” and a SIM card is essentially the card that holds your subscriber identity data. It’s the small chip-like card that you insert into your phone before you can begin using it.

A SIM (Subscriber Identity Module) card is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones and laptops).

A SIM (Subscriber Identity Module) card is a small, removable card used in mobile devices to connect to cellular networks.

A subscriber identity module, or SIM card, as it is commonly known, is a foundational component of modern mobile devices, including phones and tablets. It’s a small card in your phone that houses essential information for your mobile device to operate.