How to back up ios 1 1 SMS?

1. Open the settings on the iphone interface:

2. Then drop down the page selection interface to enter iCloud:

3. Then log in to your Apple ID and press Backup to enter:

4. Push open the closed iCloud cloud backup, and you can back up the SMS to Apple iCloud cloud.

Another way is to connect to itunes, then select your phone and click Back Up Now in the summary. After the backup is completed, iTunes software will automatically back up the SMS on the iphone to the computer.