Turn on Wi-Fi and Bluetooth on both iPhones
Place both iPhones near each other
Use Quick Start during iPhone setup
Choose Transfer from iPhone when prompted
Keep both iPhones plugged into power
Wait for the transfer to complete
Open Photos on the new iPhone to confirm
Use iCloud Photos on both iPhones
Sign in with the same Apple ID
Turn on Photos in iCloud settings
Wait for photos to sync to the new iPhone
Use AirDrop to send selected photos
Select photos in Photos app
Tap Share
Tap AirDrop
Choose the other iPhone
Use a computer with Finder or iTunes
Back up the old iPhone
Restore the backup to the new iPhone
Use third-party transfer apps if needed