iPhones and iPads that support two cellular calling plans at once add an option that lets your device draw from both connections when it’s useful. iPhones and iPads released in the last few years with a physical SIM slot let you add a second as an eSIM. The iPhone 13 and later can also use two eSIMs instead of a physical SIM, while iPhone 14 models sold in the United States only have eSIM support (for one or two in use at a time).
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