Transfer of SIM card before quick start

Hello MelloB2,

Thanks for posting in the Apple Support Communities!

We understand you're transferring to a new iPhone and curious when the SIM is transferred, right? This would occur during the set-up process after Quick Start, and you may also be able to set this up in Settings. Check out the following resource for more details on transferring your eSIM: About eSIM on iPhone - Apple Support

How to set up an eSIM on iPhone

Setting up your eSIM is usually just a matter of turning on your new iPhone and following the onscreen instructions. 

You can activate your eSIM while you're setting up your iPhone if your carrier supports eSIM Carrier Activation or eSIM Quick Transfer. With eSIM Carrier Activation, your carrier assigns an eSIM to your iPhone when you purchase it. With eSIM Quick Transfer, you transfer the SIM from your previous iPhone to your new iPhone without contacting your carrier. With either method, to activate your eSIM during setup, turn on your iPhone and follow the instructions.

You can also use these options later to add or transfer an eSIM. If these options aren't available, contact your carrier to activate your eSIM using a QR code or your carrier's iPhone app.

If you purchased an iPhone 14 model in the United States, your iPhone activates with an eSIM. To activate your eSIM using eSIM Carrier Activation, eSIM Quick Transfer, or another activation method, turn on your iPhone and follow the instructions.

We hope that information is able to help.

Have a great day!