TextRecover (You will need a MAC or a Windows computer) will let you access all your texts, yes even deleted ones. It's very simple and the uses are limitless.

How it works? Simply
Download the app
Create an account
Download the tool on your MAC

There you will download a needed extra software for free that will find all you messages that were once on your phone, as well as the current ones. (You will need to login with the account your created in the software)

Note: The software scans your phone for bits and pieces of text messages, for this reason, the sender or receiver will not show. What you will get is just a list of all your messages.

Note: Rarely some messages that you erased were needed for memory of new messages and will not be able to retrieve.

Feel free to ask any questions at: textrecover@gmail.com