What is an eSIM? What it means for your phone or Apple Watch

Put simply, eSIM, or embedded SIM card, replaces the need for a physical SIM card – and therefore, a SIM card slot – on your device. While the number of devices using it has remained relatively humble, with Apple’s iPhone 14 and iPhone 14 Pro making the jump to eSIM-only in the US, it’s only a matter of time before other smartphone manufacturers follow suit.