All About Smartphones

iOS downgrade Just recently, Apple released iOS 6.1.3 and many people that loved their jailbroken devices blindly updated only to find out that it is impossible to jailbreak iOS 6.1.3. Desperately, many of sort to downgrade back to 6.1.2 or lower for those with iPhone 3GS & 4 only to end up with a device in soft DFU loop; that is device refuses to boot up. Across various forums and discussion sites, this problem have been reported by those that tried downgrading using SHSH blobs saved on Cydia servers. Those that downgraded using blobs saved with iFaith and TinyUmbrella hardly experience this problem. This problem received little answer as to why it happens. Well, Saurik, the guy behind Cydia offered some insights as to why this problem occur. This you can find here for better understanding.  In summary, what he is saying is that Apple have implemented a kind of mechanism that only allow the restoration to most recent firmwares, more like most recent and two...