I have an iPhone 4 2012 with ios 6.1.3 on it. I tried to jailbreak it using snowbreeze, but after I've produced the custom IPSW and try to restore the iphone with iTunes, at the end I get a 3194 error. My question is: is it still possible to jailbreak it? Or, since Apple has blocked the signatures of iOS 6.1.3 and iOS 6.1.4. it is impossible to jailbreak? I thought that blocking the signatures would make it impossible to downgrade from ios 7 to 6.1.3 but at this point I'm very confused and would greatly appreciate your help. Thanks a lot in advance, Pino.