UnDeleteSMS jailbreak app allows you to recovered deleted sms from your iPhone memory . Have you recently deleted and important text message which you later regret. Here is a solution from the jailbreak developers.
Note : Your iPhone must be jailbroken and running Cydia to be able to install and use this jailbreak tweak.
How to Use Un-Delete SMS Application :
To recover the deleted sms , first you have to launch the app from homescreen of your iphone . Click on “OK” in SMS Recovery page . The messages will be displayed in plain text which can be copied ans pasted to other applications e.g Notes , Email.
This app will try to recover the deleted text messages but cannot guarantee recovery of all messages as the iphone memory keeps getting overwritten .
Available in Cydia for $6.99 .