How do I restore from back up on a new phone

Check this link...

Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

You can also go to the Apple Store to restore any Apps that have not transferred. Just click on the small cloud symbol to redownload any previously downloaded apps. Keep in mind that some apps may not be available if they have not been updated to the latest version.

By following these instructions:--> Restore your iPhone, iPad, or iPod touch from a backup

Regards

Giulio