Okay, I have my 3GS since release and it's right now 3.0 jailbroken, NOW I finally decided to upgrade it to 3.1.2 and jailbreak it with blackra1n but I can't! When i try to upgrade it using my iTunes, it says the firmware file is not authorized...or something like that (Apple stopped signing the firmawares?). Is there a way I can upgrade? Thanks in advance. EDIT: I heard snowbreeze can jailbreak iPhone 3GS(?) but only the old bootrom models, how do I know my iphone 3gs is the old model? Got it the first week of July 09.