How to transfer the data of the old iphone to the new iphone?

Do the old and new iPhone need the same apple? ID, and then open the automatic download function to complete the import of old and new mobile phone data. The specific setting process is as follows:

1. Take the iPhone 7 as an example, light up the phone desktop and open "Settings" to enter the next step.

2. After entering the setting interface, click the "Apple ID" option in the red box to enter the next step.

3. Then open "iTunes Store and App Store" and click to enter the next step.

4. Turn on all the option switches selected in the red box, and then repeat the above operation on another iPhone to complete the setting.