How does Apple's mobile phone automatically back up the messages it sends and receives?

1. Plug in your phone, click Settings -icloud, and then click "Storage Space" again in the page displayed by icloud.

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2. Click "Storage Space", and the page that comes out will click "Manage Storage Space" again.

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3. After the page of managing storage space comes out, click this iPhone subpage.

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4. After clicking on this iPhone, pay attention to the backup time. As shown in the latest backup 02: 18.

The last backup was at 02: 08 this morning. If the backup is more than 24 hours, it will be displayed until Sunday. Don't worry, there will be no confusion.

5. Plug in the power supply and access wifi. Wait for iPhone to back up to iCloud.

After the backup is completed, please follow Article 6.

6. A brand-new iPhone or any iPhone will do.

6. 1. Click Settings-General-Restore-Erase all contents and settings-Erase iPhone. Unless it is a new machine, you are strongly required to make a backup when doing this step, so as not to have no room for regret.

6.2. Activate the iPhone as usual. After entering the apple ID, a dialog box will appear:

"As a new iPhone", "Restore Backup from iTunes" and "Restore Backup from icloud"

6.3. Select Restore Backup from icloud, then log in to icloud and wait. After the recovery is completed, all your memos, text messages, photos (if you open photo backup in icloud), address book and even phone records will be accurately copied to your iPhone.

The above answer is for the iPhone that has not escaped from prison.

If the iPhone has been jailbroken, you can use the jailbroken version of QQ Synchronization Assistant, and you can directly back up your address book and SMS (except SMS) to your QQ cloud.

Then you can restore these messages to Android phones or other platforms supported by QQ synchronization assistant.