Hi there! I'm new to the game and recently jailbroke my 3GS (3.1.2) with Blackra1n (untethered) on XP. It worked an absolute dream until I got a little c*cky and began installing copious amounts of random junk. After trying a number of things: (Blackra1n, redsn0w, iH8sn0w’s iREB booter etc.) to get out of an endless bootloop that I found myself in – I was led to believe that my only option was to upgrade to 3.1.3, which I did on stock firmware.. (Stupid I know!) I used USB View and determined that my BootRom is: [iBoot-359.3] (The old one..) Which seems to be a good thing.. As I am sure you can understand that I am now struggling with the stock iPhone outcome, particularly when I was in the ideal situation with an untethered 3GS (old bootrom) on 3.1.2 firmware.. My question being, when I backed up my SHSH's with Cydia (while I was on 3.1.2 firmware), they were backed up as 3.1.3 SHSH's, as Apple had stopped signing 3.1.2 firmware.. Now that I'm on stock 3.1.3, are these 3.1.3 SHSH's of any use to me? Can I use them to benefit me in a jailbreak somehow, as I read somewhere that by uploading stock 3.1.3 f/w it will block the part of the phone that a jailbreak uses to gain access (or something)..? Does this mean that my 3.1.3 SHSH's on Cydia will somehow reverse this..? I'm not too sure, I know I am clearly clutching at straws.. I pretty much just need a straight answer from someone who actually knows what they are talking about! Any input would be greatly appreciated.. Thanks in advance!