Question: how to transfer all data from iphone 6 to iphone 8?
Answer: Run iTunes, and right-click on the iPhone in the iTunes sidebar and choose Back Up. Wait for the backup to finish, then unplug your old iPhone. 3. Now turn on the new iPhone 8/iPhone 8 Plus, and at the “Set Up iPhone” screen, select “Restore from iTunes Backup”, tap Next, then connect the new iPhone to the computer.