Is there a way you can retrieve information deleted on iphone 4s?

I'm giving my brother my iphone 4s cause i got a new phone. Since hes known to snoop around i wanted to know if there's a way you can get back deleted info such as pictures taken, text messages and whatsapp texts?

You can try this:
http://www.wondershare.com/disk-utility/recover-deleted-video-from-iphone.html
If it do'nt work:
Unfortunately, there isn't a way. Once it's gone, it's gone.

I do not know there was a way to get it back the deleted text messages on iPhone 4 S. Because one of my friend tried a lot but he could not that't why i also do believe that there was no such way to get the deleted text messages on iPhone 4 S. I think you did not need to worry much about such a small thing.