You may think you've deleted them but they're still there. I found out myself when I was using spotlight search to find something and noticed that some text conversations I made months ago were showing up!
When I contacted apple customer support, they told me the only way to permanent remove all text messages and ooh yes also emails, is to do a master reset, or restore to factory setting on iTunes. This intern removes all data from your phone. The downside to this is all your contacts, apps, and settings are erased. You also can't backup from previous because then it puts it back in your phone. I know I have done it.
This is a true story about an iPhone user, who shares others about "Text messages don't actually get deleted" on Apple forums generously. Here I will confirm you to find and recover deleted data of iPhone/iPad/iPod.
iPhone Data Recovery, a professional recovery software, aims to help iDevice users to recover deleted photos, text messages, contacts, videos from iPhone 5s/5c/5/4S/4/3GS, iPad mini, iPad Air, iPod touch, etc. You can just follow the tutorial below to know how to recover deleted text messages from iPhone.
Step 1. Connect your device to computer via a cable
Step 2. Choose a suitable mode to proceed
You are provided three modes to choose to continue the process, those are, "Recover from iOS Device", "Recover from iTunes Backup File" and "Recover from iCloud Backup File".
Step 3. Start scan your device
Step 4. Preview and recover deleted text messages from iPhone
After scanning your device, you can get a ordered list of your data, which contain both your deleted and remain ones, you can take a preview of them and choose what to recover by ticking them one by one.
When finishing the whole 4 steps, you can certainly recover what you want to get back with the help of iPhone Data Recovery. By the way, you can know more information about it here:
How to Recover Deleted Photos from iPhone
How to Restore Contacts on iPhone
