Restore all content to iPhone from a backup
You can restore content, settings, and apps from a backup to a new or newly erased iPhone.
Important: You must first create a backup of your iPhone. See Back up iPhone.
Restore iPhone from an iCloud backup
Turn on a new or newly erased iPhone.
Follow the online instructions to choose a language and region.
Tap Set Up Manually.
Tap Restore from iCloud Backup, then follow the onscreen instructions.
You’re asked for your Apple ID. If you’ve forgotten your Apple ID, see the Recover your Apple ID website.
Restore iPhone from a computer backup
Using USB, connect a new or newly erased iPhone to the computer containing your backup.
Do one of the following:
In the Finder sidebar on your Mac: Select your iPhone, then click Trust.
Note: To use the Finder to restore iPhone from a backup, macOS Catalina is required. With earlier versions of macOS, use iTunes to restore from a backup.
In the iTunes app on a Windows PC: If you have multiple devices connected to your PC, click the device icon near the top left of the iTunes window, then select your new or newly erased iPhone from the list.
On the welcome screen, click “Restore from this backup,” choose your backup from the list, then click Continue.
If your backup is encrypted, you must enter the password before restoring your files and settings.
See the Apple Support articles Restore your iPhone, iPad, or iPod touch from a backup and If you can’t update or restore your iPhone, iPad, or iPod touch.