Upgrade to 4.x. What do I need to do. Obviously I want to re jailbreak. When I open Cydia it says across the top: SHSH iOS 4.0, 4.02. I think those are the blobs saved by cydia for my device? Do I need that if I want to upgrade and rejailbreak? Ive read that theres a jailbreak for 4.0 but apple stop signing so I have to wait for 4.1 jailbreak? What software is needed to jailbreak 4.x? Any help is greatly appreciated. Thanks. DZL1.