More to the point, most i OS software updates modify your hardware’s baseband version, which means if you’re dependent on your jailbreak for an unlock, you will lose your unlock when you finally do upgrade.
One way of potentially restoring your unlock is to save your SHSH blobs, which is what is used to authenticate your i Phone with Apple.
The general method of recovery for an i Phone stuck in recovery mode is an i Tunes restore – great if you have recently performed an i Tunes backup, tragic if you have not.
If your last i Tunes backup was a while ago, you risk losing any data added to your device since your last i Tunes backup.
Now open this page and check if your phone is a GSM or a Global Model.
Having done that, head over to and download the latest IPSW file for your i Phone.
That’s not to say things don’t go wrong, and it might surprise you to learn there’s actually a “right way” to go about doing this.Here’s how to remove your jailbreak and restore stock i OS to your i Phone, i Pad or i Pod Touch.Your reasons for restoring will vary, but one reason people often choose to get rid of their jailbreak is to install the latest (not yet jailbroken) version of i OS.delete any already download information.before we actually update you guys want to do this at your own risk I am not responsible for any data that will be lost. if you know what you are doing go ahead into general one scroll down to erase all data.What you guys are inside of reset choose to erase all content and settings now you guys will want to put in your passcode alright I guess what type will erase your device to the factory so this is what u should do.