Famous iPhone hacker Stefan Esser, also known as i0n1c, recently wrote on twitter that we should not expect untether jailbreak for iOS 4.3.4 anytime soon. i0n1c was the one who created untether for iOS 4.3.3firmware.
Our advice is simple - save your 4.3.3 SHSH keys asap. With these SHSH keys you will be able to restore to iOS 4.3.3 anytime, without - only iOS 4.3.4. Here are tutorials for you.
iOS 5 beta 3has been released recently. It is available only for Apple registered developers. But you can try it too. Remember that you do it at your own risk. Remember your UDID must be registered at Apple in order to activate your device after install.
As you might know hacker Comex has found a new PDF vulnerability and released JailBreakMe tool that uses it. These were great news. The bad ones is that your iPhone and iPad and iPod Touch is at risk. Bad guys can use the same vulnerability to take control of your device and do whatever they want with it.
Apple will fix it in iOS 4.3.4firmware some day. Fortunately Comex has already released a patch for his JailbreakMe 3.0 exploit to protect already jailbroken devices from any malicious use of the exploit.
Apple recently released iOS 5 beta 2 and iTunes 10.5 beta 2. It is available only for Apple registered developers. But you can try it too. Remember that you do it at your own risk. Below you will find iOS 5 download links for iPhone 3GS, iPhone 4, iPod Touch 3G, iPod Touch 4G, iPad 1, iPad 2, Apple TV 2G and download links to iTunes 10.5 Mac and Windows.
Keep in mind that your iDevice will need to be activated, your UUID needs to be registered in Apple. Installing iOS beta on a non-activated device will render it useless. If you need help with registering UUID - write us, we will try to help..
If you need a jailbreak, you can download it here.
You will be able to go back to iOS 4.3.3 (tutorial).
Apple does not allow users to install iOS version that is older than the latest released version. There is a workaround for this restriction. Users who have saved SHSH blobs using Cydia or TinyUmbrella for particular iOS version and particular iDevice can restore to this iOS.
According to the iPhone Dev-Team, Apple is now making this process much more difficult with iOS 5. This means that current process will not work with iOS 5. But users who saved 4.x SHSH keys will be able to restore to 4.x.