In Order To Unlock your Iphone,first you must Downgrade to 3.1.2,below you have the right informations,how to do it:
1 Step : Bypassing the Overlord
To this end, I have constructed a server that duplicates the functionality exposed by Apple’s signature server, except using “on file” results rather than live requests.All we need, then, is to make iTunes use it. Luckily, most operating systems also have the ability to locally define bypasses on specific hostnames through a file called hosts. Using this, we can redirect requests to Apple’s signature server to Cydia.So, open the file C:\Windows\System32\drivers\etc\hosts (Windows) or /etc/hosts (Mac OS X) and add the following entry to the bottom of the file.
74.208.10.249 gs.apple.com
Now, when iTunes thinks it is talking to Apple, it is talking to Cydia instead. Doing this will allow iTunes to access signatures already stored by Cydia’s “on file” feature.This server will also act as a cache for any SHSH blobs it hasn’t seen, acting as an intermediary to Apple’s server. This effectively registers your device with the “on file” mechanism, which means you can now enjoy the protections of being able to downgrade your firmware in the future even if you aren’t jailbroken.
2 Step : Download Previous O.S File
You must select previous O.S file from <a href=”http://www.unlock-iphone-313.com/category/downloads/”>Here</a>,and download it on your computer.
3 Step : Download <a href=”http://www.unlock-iphone-313.com/category/downloads/”>quickpwn22 </a>and unzip to a folder or desktop.
4 Step : Performing the Restore
Down grade to a downloaded custom 3.1.2 ipsw, open itunes plug your phone in and put your phone in dfu mode not recovery mode, hold sleep and home 10 seconds let go sleep and contiue to hold home 10 seconds till a pop up on itunes tells you you’re in recovery mode and need to restore in order to continue,hold shift and click restore same time navigate to custom 3.1.2 ipsw file and restore when it’s done you will get an error 1015 or 1014, that’s ok that means you’re backed up oncydia and it’s communicating, the you will be in recovery mode where you will see disk and connection cord on screen, just click shift and restore and insert custom ipsw file again hit restore.same error message 1015 will appear, now start quickpwn 22 while your still jacked in on itunes, it will give you a message that says hold sleep and home for 15sec then let go of home and continue to hold sleep for 2 seconds, this will get you out of recovery and your official carrier back.
5 Step : Run our last blackra1n software from our download page or from <a href=”http://www.unlock-iphone-313.com/category/downloads/”>Here </a>