How to transfer contacts from old device to new device
How to transfer contacts from old iphone to new iphone
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You can transfer all of your data from an old phone to a new one using one of theses three methods.
Transfer data from your previous iOS or iPadOS device to your new iPhone or iPad - Apple Support
If you sync contacts with iCloud or with an email account, you may have to turn that on again in the iCloud settings or in the mail account from which you sync contacts.