Hi Sorry to just jump in, but this seems like a good place to ask questions from helpful people! I am jailbroken and unlocked on OS 3.1.2 with a iPhone 3GS (new boot). I have my 3.1.2 SHSH file (I hope). I retrieved it with this Umbrella, but it is 64k in size (rather than 66, which is what I've read it should be). What I am trying to understand is just how safe am I to restore? I want to rejailbreak and unlock as I am having the odd connectivity issue, but I don't want to risk what I have. Is it fairly safe to restore? What I mean is, if it doesn't work (the restore) or my SHSH blob is corrupt in some way, will I be able to get my original system back? Many thanks in advance!