How does iphone4s export short messages to the computer without jailbreaking?

You can't export short messages to your computer without jailbreaking, but you can back them up to your computer or copy and paste them into txt documents.

Operation:

Connect the iPhone to the computer.

Open pp assistant,

Click on "information",

Click "SMS",

Check the mail to be backed up,

Click Backup and select a location to start the backup.

Click Copy to copy it directly to the clipboard, and then paste it into the document.