iREB is a tool for Windows that can put your device into pwned state so that you will able to install a custom firmware to it. If you try to restore to a custom iOS 5 beta firmware on your iPhone, iPad or iPod Touch, then iTunes will return an error 16xx. This is due to the fact that your device can actually determine if your are using a stock IPSW or a custom one....

Yep! Now you can create signed IPSW for your iDevice using iH8sn0w's iFaith tool (aka SHSH Dumper). This signed IPSW will NOT jailbreak your iDevice but will only restore your iDevice to stock firmware without need of pointing iTunes to Cydia server using TinyUmbrella or HOSTS file. In this way, you can restore stock firmware on your iDevice and then can jailbreak it using tools like Redsn0w, GreenPois0n, Limera1n, JailbreakMe or Spirit.

iH8sn0w has just released Sn0wbreeze 2.7.3, a minor update which brings fix for PacMan game which you can play while Sn0wbreeze cook the custom IPSW for your iDevice. Apart from PacMan update, Sn0wbreeze 2.7.3 can now jailbreak just released iOS 4.2.2 on Apple TV 2G. To jailbreak iOS 4.3.3 and iOS 4.2.8 on all other iDevices (except iPad 2), Sn0wbreeze 2.7.3 uses the same i0n1c's untethered exploit which was previously used to jailbreak iOS 4.3,...

iPhone Dev-Team has just released official PwnageTool bundle to jailbreak iOS 4.2.2 (Build 8F305) on Apple TV 2G. This PwnageTool bundle incorporates i0n1c's iOS 4.3.1 untethered exploit which is still vulnerable to iOS 4.3.2, iOS 4.3.3, iOS 4.2.8 and just released iOS 4.2.2 for Apple TV 2G. You can use this bundle to patch PwnageTool 4.3.3.1 and create iOS 4.2.2 custom IPSW for your Apple TV. Restoring this custom IPSW will jailbreak your Apple TV...

Here is a quick tip for those who want to restore iOS 4.3.2 custom IPSW on Mac OS X without any restore error. To restore iOS 4.3.2 custom IPSW, you need to put your iDevice into Pwned DFU Mode by using iREB. Unfortunately iREB for Mac OS X is not available yet, so here is a workaround which will teach you how you can patch the iBoot of your iDevice on Mac OS X using...

iPhone Dev-Team has just released PwnageTool 4.3.2 to jailbreak iOS 4.3.2 untethered on Mac OS X. PwnageTool 4.3.2, which now includes i0n1c's untethered exploit, can create iOS 4.3.2 custom IPSW for your iPhone 4/3GS, iPod Touch 4G/3G, 1st-Gen iPad and AppleTV 2G. On restoring the custom IPSW made with PwnageTool, it will not only jailbreak your iPhone on iOS 4.3.2 but will also preserve its current baseband for unlocking purpose.

Here is a list of iOS 4.3.2 custom IPSWs made with Sn0wbreeze 2.6 which you can download and restore on your iDevice directly through iTunes. Restoring these custom IPSWs will not only jailbreak your iPhone on iOS 4.3.2 untethered but will also preserve its current baseband version for unlocking purpose. Before restoring these custom IPSWs, do not forget to put your iDevice in Pwned DFU Mode using iREB.

Here is a list of iOS 4.3.1 custom IPSWs which you can download and restore through iTunes to get fully untethered iOS 4.3.1 jailbreak on your iDevice. Before restoring these custom IPSWs, you must put your iDevice into Pwned DFU Mode. To do that follow this guide if you are on Windows and this guide if you are on Mac. Once your iDevice is in Pwned DFU Mode, follow this guide to restore iOS 4.3.1...

This is a general guide for those who are new to jailbreak arena. The stock IPSW file is the one which is unmodified and is directly downloaded from Apple website. Custom IPSW is the firmware file made by using tools like Sn0wbreeze or PwnageTool. Restoring custom IPSW to your iPhone not only jailbreaks it but also helps you to preserve your current baseband for unlocking purpose.

iH8sn0w has released Sn0wbreeze 2.4b1 which can jailbreak iOS 4.3.1 on iPhone 4/3GS, iPod Touch 4G/3G & 1st-Gen iPad. If you are on Windows, you can use Sn0wbreeze to create iOS 4.3.1 custom IPSW for your iDevice. If you are on Mac, you can use PwnageTool bundles created by DjayB6 (@DjayB6) to jailbreak iOS 4.3.1 on iPhone 4, iPhone 3GS, iPod Touch 4G and iPad.