Apple is ditching physical SIM cards. Here's what you should know

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A SIM card is a unique identifier in every cell phone that enables the device to connect to wireless networks in order to text and make calls. An eSIM refers to an "embedded" SIM, or a card that is hardwired into the phone itself. People tend to change their SIM cards when they are switching carrier plans or traveling internationally and seeking to use a different service provider during their tri...

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