What is a SIM card used for? A SIM card, or a subscriber identity module/subscriber identification module, is a tiny memory card that contains unique information and is linked to a particular network ...

If your new phone no longer supports SIM cards, or you don't want to use them anymore, you can convert to eSIM instead.

Dual SIM Dual Standby and eSIM are both relatively recent additions to Apple's mobile device lineup. Here's what they are and what they mean to iPhone and Apple Watch users. Modern mobile devices are ...

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