how do I open the Iphone 13 pro to install the sim card
how to install sim card on Iph13pro
iPhone 13 Pro, iOS 15
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You don't need to open the iPhone. There is a SIM card slot on the side of the iPone, you can eject by inserting a SIM card tool or a straightened paper clip.
See here: Remove or switch the SIM card in your iPhone - Apple Support