Update your iPhone 15 before transferring content

Important iOS 17 software update for iPhone 15 models

FYI: You must update to iOS 17.0.2 on your new iPhone 15 before transferring data from your old device. 

When you turn on your new iPhone 15 and start the set-up process, you’ll see this prompt:
IMPORTANT: Update your software now if you want to transfer your data directly from another iPhone. You can update later if you plan to download from iCloud or set up your iPhone as a new device.

If you used From Another iPhone and it didn't work, you need to connect the new iPhone to a Mac or PC to reset it and complete the transfer. To get detailed steps, go to: If your new iPhone gets stuck on the Apple logo when you transfer from your previous device (HT213933).