Hey guys. I needed some help unjailbreaking my iphone 3gs with version 3.1.3 software. I've been looking all over the place to find a thread that suits my problem, but none have really shot out in my eyes. If anyone could please take me through a step by step procedure on how to unjailbreak my iPhone that would be awsome. Also, do I lose all my data? Such as contacts, songs, pictures, notes, etc? If someone could explain in extreme detail that would be great. Thanks!