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Untethered JB Impossible?
- Thread starter dylanmoro
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No jailbreak for you. You can only jailbreak 4.0 if you are coming from a previously jailbroken 3.1.2 or 3.1.3 (without Spirit). You have to wait for the next jailbreak.
And I forgot to mention that you can't downgrade since you don't have your SHSH blobs on Saurik's servers.
eta on that?
can you explain that as if you were talking to a retard? thanks.
No ETA yet. I would expect to see something shortly after the 4.0.1 iOS update.
As for the downgrade...Apple verifies every iPhone software restore. Notice how you can't restore your software without an internet connection? That is because it verifies with Apple's servers.
Beginning with the 3GS, Saurik, the guy behind Cydia created a server in the middle of your iPhone and Apple's activation servers that will intercept the little files that told your iPhone it is ok to restore the given software. With each software upgrade he kept those little files for your phone, so if you ever wanted to downgrade to a previous version, his server gives your phone the OK to do so. Therefore, if you have never jailbroken before, you will not have that little file on his server, and your phone will not be given the ok to downgrade to a previous version.
Don't worry though, there will be a jailbreak for iOS 4 soon.
As for the downgrade...Apple verifies every iPhone software restore. Notice how you can't restore your software without an internet connection? That is because it verifies with Apple's servers.
Beginning with the 3GS, Saurik, the guy behind Cydia created a server in the middle of your iPhone and Apple's activation servers that will intercept the little files that told your iPhone it is ok to restore the given software. With each software upgrade he kept those little files for your phone, so if you ever wanted to downgrade to a previous version, his server gives your phone the OK to do so. Therefore, if you have never jailbroken before, you will not have that little file on his server, and your phone will not be given the ok to downgrade to a previous version.
Don't worry though, there will be a jailbreak for iOS 4 soon.
Something I never understood 100%. I thought this only affected downgrading. Why can't he create a custom firmware with pwnagetool and restore to that? He's technically restoring the phone to the same fw version. Will not having the SHSH blogs also prevent that?
Do you know if it is possible to jailbreak an iPhone 3GS with 3.1.3 with the old bootrom, and 05.12.01?
just so you know, the baseband (05.12.01) has nothing to do with jailbreaking, only unlocking it to be used with other carriers. So if you just want a jb, spirit will work, if you want to unlock your phone too i think redsn0w would work, but i'm not sure, that might be too high of a bb.
Come on guys..READ. Says in the first post, new bootrom...resulting in not being able to use custom FW's.
haha thanks, but since you sound like you know what you're talking about, the only thing i can do is wait on the new spirit 4.0 to come out, right?
First off you need old bootrom. Second when you downgrade you are going to a firmware which has a hackable iboot and when you upgrade to a custom firmware you are keeping the hacked iboot compared to regular 4.0 which doesn't have a known hackable iboot.