Question about jailbreaking and SHSH blobs

[alec6542]

I have a quick question. I know it is important to have your SHSH blobs saved so you can downgrade your firmware in the event Apple stops signing the firmware for the current jailbreak. My question is: suppose Apple stops signing iOS 5.1.1. Would it still possible to jailbreak an iDevice that has not been upgraded (i.e. it still has iOS 5.1.1 but no SHSH blobs saved)?

Thanks,
Alec

 

[dhlizard]

I have a quick question. I know it is important to have your SHSH blobs saved so you can downgrade your firmware in the event Apple stops signing the firmware for the current jailbreak. My question is: suppose Apple stops signing iOS 5.1.1. Would it still possible to jailbreak an iDevice that has not been upgraded (i.e. it still has iOS 5.1.1 but no SHSH blobs saved)?

Thanks,
Alec

If you are asking are hashes required to complete a jailbreak of an iDevice already on a firmware ? No, just a jailbreak tool on a computer with Internet access.

 

[Applejuiced]

Would it still possible to jailbreak an iDevice that has not been upgraded (i.e. it still has iOS 5.1.1 but no SHSH blobs saved)?

Thanks,
Alec

Yes, if its still on 5.1.1 for example and you want to JB you can at any time. SHSH blobs are only used when restoring to firmware not signed by Apple any longer. But they're not used when you just JB.

 

[NanoNyrd]

I have a quick question. I know it is important to have your SHSH blobs saved so you can downgrade your firmware in the event Apple stops signing the firmware for the current jailbreak. My question is: suppose Apple stops signing iOS 5.1.1. Would it still possible to jailbreak an iDevice that has not been upgraded (i.e. it still has iOS 5.1.1 but no SHSH blobs saved)?

Thanks,
Alec

Yes, you can still jailbreak. But if you mess up, you will need the SHSH blobs to recover, otherwise your only option will be to restore to the newest firmware.

So save your SHSH blobs now, just in case.

Of course, if you later get a phone with 5.1.1 and no saved blobs, you can still jailbreak it, just don't mess up

Or use iFaith / redsn0w to read off the SHSH blobs before beginning, if it is an iPhone 4 or older (they cannot do it with a 4S).