SHSH blobs is a digital signature, unique for each Apple device, that subscribes the firmware file before it is installed on the device. SHSH contacts a specific Apple server (gs.apple.com) to analyze the identification number of the firmwared device, sent out by iTunes. The subscription system debuted in summer 2009, along with the release of iPhone 3GS. Basically, if you want to downgrade you Apple device, iTunes contacts the Apple company server and sends some information data about your phone, including the unique identification code of your chip. This system is easy and fast to manipulate your Apple device firmware, if you have the right SHSH blobs.
If you desire to downgrade your firmware but don’t have the necessary SHSH blobs, just click on the button below to receive SHSH blobs for iOS 6.1.2 and start the process. The download is 100% free!