Apple is quite adamant that when a individual opts to upgrade, they don’t want them to be able to roll-back the software application on their gadget to a previous version of iOS. In a great deal of circumstances, this wouldn’t be an issue, however there are a number of genuine reasons for individuals wanting to downgrade to an older version, in this case, from iOS 6 to iOS 5.1.1.

Potential reasons for downgrading firmware might variety from wanting the iphone or iPod touch on a version of iOS that currently has an untethered jailbreak* offered or might just be since updating to iOS 6 has brought with it some unforeseen battery drain or triggered other problems. Thankfully, it is completely possible for owners of particular gadgets to downgrade with Redsn0w, as well as we have covered the total process below.

There a few bit things to note as well as take into account:

This downgrade process only applies to iOS gadgets that are bundled with Apple’s A4 SoC or below. This includes iphone 4, iphone 3GS as well as iPod touch 4G. later generation gadgets such as the iphone 4S or iPad 3 are not vulnerable to the limera1n exploit.

The downgrade process depends on the SHSH as well as APTickets being saved for the appropriate firmware version that the individual is attempting to downgrade to. For those that may not know, the APTicket is something that Apple introduced in iOS 5 as part of the bring back process with iTunes as well as their activation servers. So yes, you requirement to have SHSH blobs for iOS 5.1.1 firmware saved for the gadget you want to downgrade.

If you don’t already have SHSH blobs saved for iOS 5.1.1, you are out of luck for now as Apple has stopped signing this firmware.

Owners of an iphone that needs a software application unlock by utilizing Ultrasn0w should very first produce a customized developed firmware that doesn’t include the upgraded baseband. The customized produced firmware will be the one to which Redsn0w is directed to in step 5 below.

Step 1: before going with a downgrade or jailbreak process, it is always a great concept to backup the gadget in question. depending upon your favored method, utilize either iTunes or iCloud to save all appropriate data as well as data from the device.

Step 2: download Redsn0w 0.9.14b2 version of the iphone Dev Team’s Redsn0w tool that is appropriate to the operating system of your computer (Windows/Mac). You will likewise requirement to download iOS 5.1.1 firmware.

Step 3: link the gadget to your computer utilizing the supplied USB cable. Extract the contents of the downloaded Redsn0w data from step 2 as well as run the application. go into your gadget into DFU mode.

Step 4: From the primary Redsn0w interface; choose the Extras then choose SHSH Blobs from the middle of the offered buttons.

Step 5: The next stage of the process is to choose the stitch option. Redsn0w will now be split into two sections, one devoted to the IPSW that the individual is attempting to downgrade to as well as the other for the SHSH blobs for the firmware. click on IPSW as well as choose the appropriate firmware file. If depending on a software application unlock then this firmware data will be the customized data that was produced at an earlier time utilizing Redsn0w, as discussed in the notes above.

Step 6: If the SHSH blobs for the firmware are saved locally then choose regional as well as point Redsn0w to the location where they are saved. If the blobs are saved within Cydia, then location the gadget into DFU mode as well as click on the Cydia option.

Step 7: Redsn0w will produce a new IPSW data that has the appropriate as well as appropriate permissions stitched into it. individuals now requirement to apply the Pwned DFU specify to their gadget by choosing Extras as well as then Pwned DFU from the Redsn0w primary interface.

Step 8: As part of the process, the bring back is verified with Apple to ensure that it can be returned as genuine. For this to happen, some extra information needs to be added to the holds data kept on the computer. Windows individuals requirement to navigate to Windows > System 32 > chauffeurs > etc as well as open up the holds file. Mac OS X individuals will just requirement to open the etc folder.

Step 9: find the holds data in the previously mentioned directory as well as open it up utilizing your preferred text editor on your computer. At the extremely bottom of the data add the complying with text: 74.208.105.171 gs.apple.com. Save the data to its original location. 

Step 10: The final step in the process is to apply the recently stitched firmware to the A4 gadget with the bring back process. open up the iTunes application on the computer, choose the linked gadget from the left-hand side as well as invoke a handbook bring back by pressing left Alt + bring back (OS X) or left shift + bring back (Windows). When prompted, choose the IPSW that Redsn0w hnull