Update : Beta 3 released !

The b3 version of redsn0w fixes a problem where re-running redsn0w over an existing jailbreak would cause MobileSubstrate-based apps to stop running until MS was installed again.  Now you can re-run the redsn0w jailbreak step without worrying about that (but still remember to de-select the “Install Cydia” option if it’s already installed).

It has been nearly eight weeks since the first declaration by pod2g that he had found a bug that he believed could provide an untethered jailbreak for iOS 5. We find ourselves exactly fifty days down the line, and what I imagine has been a lot of sleepless nights for the developers involved, but we now officially have the release of an untethered jailbreak for all A4 devices running iOS 5.0.1.

On December 22nd, pod2g announced via his official blog that would be passing all of his work and details across to the researchers at the Chronic Development Team partly to allow him to concentrate on progressing the development of an A5 jailbreak, and partly because he believed that the Chronic Dev Team could integrate and package all of his work into a distributable jailbreak.
It seems that his instincts were correct as only five days after that decision was made, we are seeing a release of a jailbreak for A4 devices on iOS 5.0.1 which has been implemented by both the Chronic Dev  and iPhone Dev teams.
The iOS 5.0.1 untethered jailbreak contains the exact same set of files that pod2g provided to the Chronic Dev Team, and can be distributed as either a download via Cydia by searching for a package named ‘Corona’, for users who are already jailbroken tethered, or through a Redsn0w bundle for users who have running stock iOS and have been waiting for this untether.
At the time of writing, it is worth noting that this jailbreak currently only supports iOS 5.0.1 with Chronic Dev Team member p0sixninja tweeting out that 5.0 will follow soon after a number of small bugs have been eradicated and more testing has been carried out. Pod2g has also released some advice to A4 and A5 users advising not to update their devices to iOS 5.0.2 or 5.1 when released as this would cut their chance of a future jailbreak.


For Users On iOS 5.0.1 Tethered Jailbreak:

If you are currently operating an A4 device which has a tethered jailbreak using Redsn0w, Ac1dSn0w or Sn0wbreeze then you can simply launch Cydia from your Springboard and download a package named ‘Corona’ which will provide you with an untethered jailbreak.


For Users On Stock iOS 5.0.1:

If your device is running stock iOS 5.0.1 then you can use download the latest Redsn0w 0.9.10b3 to for either Windows or Mac to give yourself an untethered jailbreak, instructions for which can be found below.

Step 1: Download the latest version of Redsn0w from the links given above.
Step 2: Start Redsn0w, select "Jailbreak" then check "Install Cydia". Follow the onscreen steps to place your device into DFU mode.
Step 3: Wait for Redsn0w to apply the full untethered jailbreak!
Once done, your iPhone, iPad or iPod touch will be rebooted into fully untethered jailbreak mode!

For Users Who Rely On Unlock:

For those of you who rely on Ultrasn0w or Gevey SIM unlock must preserve the old baseband using “Custom IPSW” option found in Redsn0w.