Depends on which way you apply the backup. OTA icloud save or a full backup from iTunes.
Which method is best?
The simplest solution for most users is to use the iPhone Migration Tool by choosing
Transfer from iPhone during Quick Setup. This will get
all your data from your old iPhone to your new one, including local copies of photos and videos, Health data, passwords stored in Keychain, and more. It takes awhile, but in the long run, it’s actually a time saver.
When you choose
Download from iCloud, you’ll be up and running very quickly—as little as five minutes in most cases. But you’re not
fully up and running. Sure, you can use your new phone, but it’s going to have to download a lot of data in the background, and that might take hours. You may find yourself re-entering passwords you thought you had stored in Keychain or missing some data in the Health app. The Transfer from iPhone option takes longer to get started, but is far more complete.
Restoring from an encrypted backup in iTunes (or the Mac Finder in macOS Catalina or later) is both fast and complete, and is recommended if you have the ability to do so. But you’re not always near your computer or have the free storage space on it to make a backup.
Here's your quick start iPhone setup guide! Everything you need to do to set up a new iPhone and transfer data from one iPhone to another.
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