[iOS] iPhone 4 and the iOS 6.x firmwares

Abstract You are using an iPhone 4 and you coincidentally updated to iOS 6.1.3, which cannot be jailbroken at the moment. Since you saved the SHSH blobs you think you can restore by doing a replay APTicket attack with TinyUmbrella or Cydia. Sadly iTunes shows errors like 1600, 1601, 1602, 1604 etc. If you have [...]