The cat-and-mouse game between jailbreakers and Apple is getting tough for hackers with every new release of Apple iOS, as it plugs existing loopholes which they exploit. Anyone trying to restore Apple iOS 5.1.1 on iPhone 4 and 4S will face iTunes errors like 3194 and 1600 while trying to flash an sn0wbreeze customized IPSW file, even when having saved SHSH blobs and using TinyUmbrella TSS server. The solution to this problem is to have the custom .IPSW firmware file stitched with previously saved SHSH digital signatures, follow the detailed instructions ahead to get this done using sn0wbreeze.