i have an iphone 4 on 4.2.1 and i want to jailbreak it soon, but i am a little confused about whats going on with the jailbreak. I dont have SHSH blobs saved, and dont really know what that means. I agreed to have my ECID saved with cydia, does that count? How would I access the cydia server? Do i have to downgrade to 4.1 and use greenpoison, or an equivalent? Can i jailbreak 4.2.1 as of now with no SHSH? How? Thanks everyone!