Now you can Backup your SMS text messages using a jailbreak tweak named “Message2PDF” . The jailbreak app allows you to transfer the SMS text messages from your iPhone to a PDF file on your computer . You can save all your SMS message threads in a PDF file and then email them to anywhere you want . Follow the instructions below to download and install .
Download and Installation :
To download the jailbreak tweak you have to first jailbreak your iPhone 4S/iPhone 4 and install Cydia . Read How to Jailbreak iPhone . After jailbreaking launch Cydia and search for Messages2PDF and install it . The jailbreak app is available in the BigBoss repository for $1.49 . After installation you will find the app icon on your homescreen . Tap to launch the app and convert all your text messages into PDF File .