I am conducting an exam of an iPhone 4 (GSM) and tried to obtain stored text messages from a application installed on the handset called Text Plus. I ran Lantern on the device and Lantern displayed the application but not the content of the messages. Has anyone had any luck exporting the stored text messages from an application like this?
If you were able to get an extraction of the device you should be able to see the filesystem.
If you navigate to the application folder which will be something like (where XXX is the application ID)
private\var\mobile\applications\XXX
You should see all of the applications files in there and I would imagine that the SMS messages are stored in a database. This is of course an assumption as I have never seen this application on a phone I have examined.
Try UFED Physical Analyzer that also supports this application.
I sent you a PM with more details.
Ron