Mmk, so I was stupid and made a stupid decision with iOS4 [More on this in a few.] Basically, I have an iPhone 3GS which is from france, so by default it is bound to french carriers. Me being in the UK, I had to rely on carrier unlocks to get it to work with O2 [UK Carrier] For this I used Blackra1n. I was fine on unlocked/jailbroken 3.1.2, but then I saw iOS4 was released, so I updated my phone TOTALLY not thinking at the time and before it was to late, my iPhone had iOS4 on it and now I am presented with the Emergency call screen only. In iTunes I get "The SIM Card inserted in this iPhone does not appear to be supported" I think the baseband on the phone got updated to 05.13.04 with the update too. Also I cant downgrade because apparently you need SHSH blobs or something? Which I don't know what they are so I wouldn't have known how to back them up anyway. Basically, is there ANY way at all for me to downgrade, or at least get my phone in a working stage again? Hopefully! Please. Thanks in advance.