Back up your old iPhone to iCloud or a computer
Turn on your new iPhone and place it near your old iPhone
Follow the Quick Start prompt on your old iPhone
Scan the animation on the new iPhone with your old iPhone
Enter your old iPhone passcode on the new iPhone
Set up Face ID or Touch ID
Choose to transfer data directly or restore from iCloud backup
Sign in with your Apple ID
Wait for apps, photos, messages, and settings to transfer
Keep both iPhones connected to Wi-Fi and power until setup finishes
Check that your SIM or eSIM is activated
Verify your contacts, photos, apps, and accounts on the new iPhone
Erase the old iPhone only after confirming everything transferred correctly