I just taught my mom how to permanently delete text messages from iPhone 4. She had been asking me about it for weeks. I finally went over to her house to help her. It was pretty easy to do but she doesn’t know a lot about phones. I was the one that had to set up her phone in the first place. She is always calling me about what she should do and why. It can be a little frustrating sometimes but she is my mom so I do it for her anyway.