With the new iOS 4.0.1 coming out soon, Apple will stop signing the iOS 4.0. When the 4.0 jailbreak for the 2nd Gen (MC Model) iPod Touch, the 3rd Gen Ipod touch, and the new Bootrom iPhone 3GS, comes out, you never know when you might have to downgrade. My recommendations is not to make the same mistake that I made and not backup my SHSHs for 3.1.3, and actually backup the iOS 4.0 SHSHs. WHAT YOU WILL NEED: 1. A PC or a Mac 2. The Latest version of Tiny Umbrella (Windows: http://ifile.it/4vi5j8s Mac: http://ifile.it/be4a15y) 3. An iPod Touch or iPhone running iOS 4.0 4. Common Sense Skill Level: Easy Step 1: Start up Tiny Umbrella and make sure that it recognizes your Device. Make sure your on an iTunes version GREATER than iTunes 9.0. iTunes 9.2 is recommended. Please Register or Log in to view images Step 2: Click on Save my SHSH...and wait for the magic to happen. Please Register or Log in to view images Step 3: DONE! Press Display SHSHs if you would like to see them. If you want to access the actuall file, for Windows, you will find it under Local Disk>Users>[your username]>.shsh Please Register or Log in to view images Thank you for reading my first tutorial. Constructive Criticism is appreciated Please Register or Log in to view images!