iPhone 4 JB should be very close. iOS 4.0.1 released

[Trouble]

http://www.boygeniusreport.com/2010/07/1...available/

The scuttlebutt was that the dev team was waiting for Apple to release their update for the iPhone 4 before they released their jailbreak. (no Stamos, that's jailbreak not jailbait http://www.foxnews.com/entertainment/201...d-student/ ). 4.0.1 is out so the JB should be soon.

Before updating your iPhone/iPod Touch/iPad use this software to back up your SHSH. http://forums.macresource.com/read.php?1,970087 Even if you don't care about jailbreaking, this will allow you to install an older iOS if you ever need to. Use it each time before you upgrade your iOS.

[Gilbert]

Seeing that Apple has already pushed out 4.1 in beta to devs, my guess is that the dev team will hold out until 4.1, but I could be wrong.

[john-o]

So since I stupidly applied the 4.01 update just now, I have to wait for another round to be able to JB my 3GS??

[RAMd®d]

If you saved you SHSH you can go back to 4.0.

[Trouble]

Recent talk is that there isn't any baseband update so 4.0.1 should be safe, but I'm not updating. I don't have the reception problem anyway.

[john-o]

RAMd®d wrote:
If you saved you SHSH you can go back to 4.0.

I did not; am I screwed?

I'm new to this whole JB thing, so don't know what my SHSH is, nor exactly what is required to be able to JB/unlock my iPhone...

[Trouble]

From planetbeing "Still encourage you not to update to 4.0.1 however, but if you missed getting a 4.0 SHSH, you can get ones for 4.0.1."

[Gilbert]

john-o wrote:
[quote=RAMd®d]
If you saved you SHSH you can go back to 4.0.

I did not; am I screwed?

I'm new to this whole JB thing, so don't know what my SHSH is, nor exactly what is required to be able to JB/unlock my iPhone...
The SHSH is in my layman's terms a signature file that permits you to install a specific firmware on a specific iPhone. In other words, it is generated specifically for each phone and each firmware. So, one cannot use an SHSH file from a friend to install on another phone.

To get your SHSH, the best way to do it, whether you are jailbroken or not, is to use a utility called the Firmware Umbrella. You can download it here:

http://thefirmwareumbrella.blogspot.com/

According to the author's latest post, you still may be able to get your SHSH files for 4.0 but as he states, you probably have hours to do it, not days.

While the README file for Firmware Umbrella is ok, here is a good tutorial on how to use it from iClarified.com:

http://www.iclarified.com/entry/index.php?enid=9189

Good luck!

[john-o]

Thanks Gilbert, but I'm still not clear about what the SHSH has to do with doing a JB... If things like PwnageTool are updated to work with 4 or even 4.01, then I wouldn't need to revert firmwares, right?

Sorry, but this is all very confusing!

[Gilbert]

john-o,

You are right, this is all can be very confusing.

Apple uses a verification process to determine if a firmware file can be installed on an iPhone. Those verification servers essentially signs the firmware file so that it can be installed. The SHSH files (or blobs as they are often called) contain the needed info specific to one's phone and firmware.

If you wanted to install an older firmware onto your iPhone, (for example, to take advantage of a jailbreak exploit in an older firmware that does not exist in a current firmware) without the SHSH files, Apple would not sign the request and force you to use the current firmware.

Essentially, the SHSH files are a safety net that allows one to roll back to an older firmware, assuming one already as the SHSH files for the older firmware.