The iPhone Dev Team has just released Redsn0w 0.9.6b4 today which brings first proper jailbreak, with working Cydia and MobileSubstrate for all iOS 4.2.1 devices.
Arriving today was the eagerly anticipated iOS 4.2.1 update, along with previously-paid Apple's device tracking, locking, and wiping tool called Find My iPhone.
The iPhone Dev Team has released new information regarding iOS 4.2.1 jailbreak and unlock situation, which is as follows.
Apart from iOS 4.2.1 for iPhone, iPad and iPod touch, also released today is iOS 4.2 for Apple TV 2G which brings video AirPlay feature that will allow you to stream pictures, videos and music right from your iPhone, iPad or iPod touch to TVs connected to the second-gen Apple TV.
Its official now! Apple has just issued a press release, confirming that the much awaited iOS 4.2.x software update will be be publicly available today for download via iTunes 10.1. Full press release is as follows
The recently released Redsn0w 0.9.6b3 can jailbreak all iOS based devices including the new A4 devices like iPhone 4, iPad and iPod touch 4G. Since Cydia included in this version of Redsn0w is not compatible with iOS 4.2.1, you can use the following steps to install a patched version of Cydia.
The iPhone Dev Team has just released Redsn0w 0.9.6b3 which brings support for iOS 4.2.1 GM firmware file. The highlight feature of this release is SSH and SSL support which will now allow you to install bundles and packages independent of Cydia, which is currently broken on 4.2.1.
PwnageTool bundle for iPod touch 4G on iOS 4.2.1 GM has just been released. You can use this bundle with existing version of PwnageTool to create custom firmware file which is jailbroken on the newly released iOS 4.2.1.
You think Apple might have have killed the white iPhone 4 in the favor of the iPhone 5? Think again! In the grey markets of China, white iPhone 4s are being sold with labels on them saying “for internal use only”, and moreover, they are all locked to AT&T, running iOS 4.1! Could this mean that Apple has plans to launch these forgotten babies in the US in the coming months or so?
Thanks to a new tweak available in Cydia, iPhone brightness can now be adjusted from the multitasking tray, found just under the music controls with App Switcher Brightness.

