From the device's initial setup, select Transfer from iPhone and tap Continue.
This step usually appears after you've logged into your Apple account and finished importing or customizing your device settings, and before you are prompted to set up Apple Pay.
Place your new device next to the iPhone you wish to transfer your number from, then tap Continue on the transferring device.
On the transferring device, enter the verification code displayed on your new device.
Tap Transfer from iPhone on the new device.
Tap Transfer Number.
Tap OK.
To proceed, you'll need to confirm the number transfer one last time via the transferring device. For most iPhone devices, this means quickly clicking the Side Button twice.
Tap Continue.
You've completed the steps!
