2. Then select the "password and account number" option in the setting interface, as shown in the figure.
Third, then open "iCloud" to enter, as shown in the figure.
4. Turn on the switch in the "Address Book" column after entering, as shown in the figure.
5. Then click the "iCloud cloud backup" option, as shown in the figure.
6. Finally, turn on the switch in the "iCloud cloud backup" column, so that iCloud will automatically export the address book to the mobile phone, as shown in the figure.