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How to share information between two Apple phones?

The sharing between two Apple phones mainly uses the same AppleID account, and the function of synchronizing information is turned on.

Change account

You can change one of the AppleID accounts to a new AppleID account, and you can't synchronize information before different accounts.

Close iMessage

In addition, if you don't change your account, just turn off the synchronization information function of iMessage, and then click Settings-Information -iMessage to turn it off.