Hey there, I have an iTouch 4G running iOS 6.1.5, and I'm in efforts to downgrade and jailbreak it to 6.1.3. I used sn0wbreeze to create custom IPSW and restoring with iTunes, but I can't manage to get through error 11. I tried TSS Server, editing hosts files, updating iTunes, but nothing, NOTHING, seems to fix this problem. Please, help needed! Thanks in advance.