Can I use the iPhone X SIM card in the iPhone 13

Hello lolotink,

Welcome to Apple Support Communities. We see you have a question about using your current SIM card from your iPhone X with a new iPhone 13. The short answer is: Yes, they are the same size as a Nano-SIM card.

Keep in mind that when purchasing your new iPhone 13, you may be able to choose one that doesn't require a SIM card for your carrier. The iPhone 13 has an option for an eSIM now, which doesn't require a SIM card to activate. Read more about the technical specifications of the iPhone 13 here:

iPhone 13 and iPhone 13 mini Technical Specifications

Learn which size SIM card your iPhone or iPad uses

If you have additional questions about eSIM and if your carrier will support it, we'd recommend reaching out to them.

Have a good day.