To change the SIM Card on your iPhone 15, start by powering it off completely.
Look for the eject hole on the outer frame of your device.
Use a SIM eject tool or a paper clip and insert it into the hole.
Gently push the button inside to release the SIM tray.
Carefully take out the tray from the frame.
Remove the existing SIM card from the tray.
When you're ready to insert a new SIM card, make sure it's properly aligned.
With the phone facing up, ensure the gold contacts on the SIM card face downward.
You can also use the outline in the tray as a guide to position the SIM card correctly.
Gently place the new SIM card into the tray, ensuring it's snug.
Carefully slide the tray back into the iPhone 15 until it clicks into place.
Power on your iPhone 15, and you're all set with the new SIM card.
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