If you’ve updated to 4.1beta2 on iPhone3G or iPod2G(non-MC), you can use this redsn0w from June to jailbreak. Just point it at the 4.0 IPSW (the public one, not the developer GM one).
(Yes – point it at the 4.0 IPSW even though you’re at 4.1beta2).
Don’t do this if you need the ultrasn0w carrier unlock!!
Note 1: This won’t hacktivate your iPhone3G – but for those with legit access to the 4.1beta2 this shouldn’t matter. Please don’t pirate Apple software
Note 2: If you’re at 4.1beta2 you’ll probably experience network problems after jailbreaking. Until a new version of redsn0w is released, you may need to rely on afc2 access (such as FunBox-like file browser programs) to manipulate your filesystem.
Note 3: This is recommended only for power users who can deal with the problems that will pop up as the JB apps fall further behind the beta firmwares.
MuscleNerd, member of the Dev-Team, has posted on his Twitter that it is possible to do the Jailbreak to IOS 4.1 beta 2 in the iPhone 3G and iPod Touch 2G (No MC). But MuscleNerd warns that there may be a number of problems:
* No Hackactivación.
* There may be network problems after installing IOS 4.1 and do the Jailbreak.
The redsn0w Jailbreak 0.9.5 is made available on its website.
We do not recommend or install the beta or do the Jailbreak IOS, wait for the final versions.
Download iOS 4.1
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