Apple IPHONE4/4S/5 upgrade update iOS7 often drop the address book

Problem phenomenon

And in the process of using the system often prompted the ID password, and then close to find My iphone, how to solve AH

Solving method

First, if you have previously logged in to the Apple icloud in iOS and have enabled your address book to sync to the network, you can restore the address book by logging in to the Apple ID. Open the Setup interface in the iOS device, switch to the icloud interface, enter the Apple ID in the Apple ID text box, enter the password in the Password box, and then click the "Sign in" button to log in to the Apple account. Click the merge button in the pop-up window to sync the address book.

Second, in order to prevent the next update iOS system when the Address Book loss, you can login icloud, and then open the Sync Address Book function, in addition, you have to open the icloud cloud Backup function, click the "Storage and backup" option, the next Interface "Backup" module to open "icloud cloud Backup" Can.

Second, if the above method cannot be resolved, set-Universal-restore-restore all settings, and then shut down for 5 minutes before powering on