How to restore photos from backup
how can I restore my photos from my old phone
iPhone X, iOS 12
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If the photos were synced to iCloud, sign into Settings/Your Name/iCloud using the same Apple ID used when the photos were synced to iCloud, and turn Photos syncing on. if the photos weren't synced to iCloud, do you have a backup you can restore from? Restoring from a backup erases all data currently on your device. Any data newer than when the backup was made will be erased. A restore is an all or nothing restore. You can't access a backup and only restore certain files.
Backup - Restore your device from an iCloud or iTunes backup