147w ago - Finally all of us iPhone 4 users now have a way to get Cydia back as the iPhone 4 Jailbreak with JailbreakMe 2.0 has arrived- Horray!
To quote: The anticipated iPhone 4 jailbreak has been released as JailbreakMe 2.0. The wait is finally over and iPhone 4 can be jailbroken on iOS 4.0 or iOS 4.0.1.
JailbreakMe is actually all in one solution for iPhone 4 3GS 3GS and iPod Touch 3G 2G along with iPad. Any iPhone on 4.0 or 4.0.1 iOS can be jailbroken using JailbreakMe 2.0. Any iPod Touch 4.0 can be jailbroken untethered irrespective of MC Models while iPad 3.2.1 jailbreak is also possible.
Caution: It is recommended to synchronize and backup your data using iTunes before employing JailbreakMe 2.0. After you have successfully executed JailbreakMe 2.0, you should save SHSH Blobs to avoid future loss in case you update to a new firmware.
The following tutorial will aid you to carry out iPhone 4 Jailbreak with JailbreakMe 2.0:
Function 1: There are two possible firmware that are installed on iPhone 4 either iOS4 or iOS 4.0.1. JailbreakMe 2.0s both iOS4 and iOS 4.0.1.
Function 2: Visit JailbreakMe.com on your iPhone 4.
Function 3: Follow the instructions on website for iPhone 4 Jailbreak.
Function 4: Let JailbreakMe 2.0 do the assigned duty and wait till it flaunts a message of Success.
Function 5: Gosh! You have a jailbroken iPhone 4 running on iOS4 or iOS 4.0.1.
For Unlockers: Bear in mind that JailbreakMe 2.0 is not an unlock for iPhone 4 rather it is iPhone 4 Jailbreak. To unlock iPhone 4 on 4.0 or 4.0.1 iOS, ultrasn0w 0.94 will be out.
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basically what they mean by saving your shsh blobs is that in case you update your firmware of your ipad/iphone/ipod etc by mistake. you will be able to downgrade again to the firmware which you are currently on.
what saving the shsh blobs does is, it saves your unique key or something on cydia's server or something not sure so that when you downgrade it tricks itunes into checking that website for your key and allows the downgrade to proceed.
in a short, no you do not have to save your shsh blobs however it is advised in case you do something stupid and update the firmware which doesn't have a jailbreak.