Thanks to iFaith you can downgrade iOS 6.1.3 without SHSH blobs to 5.1.1 or with locally saved blobs by Tinyumbrella to 6.1.2. As for me I don’t have blobs from TinyUmbrella so I used that iFaith gave me. Last time I wrote about how to dump SHSH blobs and create custom firmware using iFaith. But here is a little different method and I tried it myself on 3GS.
Now you can downgrade iOS 6.1.3 without problems because it is possible if you have all requirements fulfilled. Here below you will see how to perform downgrading process. Unfortunately SHSH blobs is the thing that is needed. So, before we start let’s take a look at the whole situation is general. Despite the worldwide popularity of Evasi0n tool allowing to jailbreak iOS 6 and iOS 6.1.2, Apple took a decision to terminate the “season of gifts” for fans of iOS hacking. A day ago, the Cupertino company released iOS 6.1.3 update and you download it now. But if you want to keep jailbreak you need to know that iOS 6.1.3 fixed the vulnerability used by Evasi0n, and thus making the