I have a jailbroken iPhone 4 with Cydia installed. Last night something happened and all my texts are gone. (Needless to say, I haven't sync'd in months) I heard there was a way to get them back as long as you have a jailbroken phone and don't do anything to overwrite the data. I shut mine off immediately, so I think that makes me a perfect. Only problem is I don't know what the hell I'm doing or how to SSH and what I'm looking for (sms.db?). But the good news is that I can follow step-by-step instructions to a tee.