While we are all waiting for jailbreak tools for iOS 4.1 (based on SHAtter exploit) to release officially, a fake tool is floating around the interwebs under the name of GreenPois0n which is claiming to jailbreak all iOS devices from 4.0.2 and above. The fake tool is actually a very dangerous malware which upon running which steal passwords (though it is not clear if it steals passwords from your iOS device or PC). I repeat: it is not the real GreenPois0n tool which is expected to jailbreak iOS 4.1 on iPhone 4, iPod touch and iPad.
Ok guys let me clear this upfront. I haven't tested this method yet, but by the looks of it, there is no reason why it shouldn’t work. If you have just got a new iPhone 4 or iPhone 3GS (new bootrom) which is on iOS 4.0.2, you can now downgrade to iOS 4.0.1 without having your SHSH blobs saved. This will of course allow you to jailbreak and unlock your new iPhone with JailbreakMe, and patch it with PDF Patch so that you are safe from PDF vulnerability in iOS 4.0.1.
Apple CEO Steve Jobs has confirmed that a new software update for iOS 4.x will be rolled out soon to fix performance woes on iPhone 3G, running iOS 4.x. He confirmed this in a reply to an email, sent to him by a user who expressed his frustration over the performance of his iPhone 3G on iOS 4, calling it '”dog slow”.
iPhone 3GS (old bootrom only) has been jailbroken successfully on iOS 4.0.2 (custom firmware) using the upcoming Sn0wbreeze 2.0 for Windows. For those of you who don’t know, Sn0wbreeze 2.0 has been developed by the same iPhone developer / hacker which has previously released sn0wbreeze for 3.1.3, sn0wbreeze for 4.0, f0recast and BlackBreeze.
Yesterday, Apple released the iOS 4.0.2 for iPhone 4, 3GS, 3G, iPod touch 3G / 2G and iOS 3.2.2 for iPad to fix the PDF exploit which was used by JailbreakMe.com. Since the nature of exploit was highly vulnerable, Apple recommended everyone to update to this new firmware in order to secure all iOS based devices. This of course also meant that jailbreak and unlock for iPhone 4, 3GS, iPad and iPod touch 3G on iOS 4.0.2 / 3.2.2 will not be possible for these mentioned devices.
While Apple has released iOS 4.0.2 for iPhone 4, 3GS and 3G, the important thing is that they haven't updated the baseband. What this means is that 05.13.04 baseband which accompanies iOS 4.0.2 is still unlockable with ultrasn0w provided that you manage to jailbreak your iOS device. At the moment, only iPhone 3G and iPod touch 2G (Non-MC model) can be jailbroken on this latest firmware using the latest version of Redsn0w. So technically, you can only unlock iPhone 3G on iOS 4.0.2.
Apple has just released iOS 4.0.2 for all iPhones, iPod touches, and iOS 3.2.2 for iPad to patch the PDF exploit which was used by JailbreakMe to jailbreak all iOS devices on iOS 4.0.1. If you want to keep your jailbreak and unlock, you better not update to this latest firmware now or you will be out of luck for long. Incase you have decided not to update, make sure you use PDF Loading Warner app which will make your web browsing safe. Of course if you care about security of your iPhone, then you can go ahead and update to the latest firmware from iTunes.
There are rumors flying left and right about Apple releasing the iOS 4.0.2 firmware for iPhones and iPod touches and iOS 3.2.2 for iPad in only a few hours from now. This update will patch the PDF exploit which is used by JailbreaMe to jailbreak all iOS devices. If you accidently update to iOS 4.0.2 / iOS 3.2.2, it will be impossible for you to jailbreak and unlock straight away until a new tool is available. The only way you can jailbreak again will be by downgrading back to iOS 4.0.1 or iOS 4 for which you will need your SHSH blobs.