Question: how to transfer data from iphone to iphone using quick start?
Answer: Place the two devices close together. During initial setup on the new device, "Quick Start" appears on the screen.
Set up the transfer. ... 
Transfer data wirelessly. ... 
Enter the old iPhone's passcode. ... 
Set up a Wi-Fi Network. ... 
Data & Privacy. ... 
Set up Face ID or Touch ID. ... 
Enter Apple ID password.