Step-by-step Tutorial: How to Untether Jailbreak and Unlock iPhone 3GS Using RedSn0w 0.9.10 (Windows) [iOS 5.0.1]
UPDATE: Apple released iOS 5.1 that is only tethered jailbreakable with redsn0w. Apple has stopped signing iOS 5.0.1, so you can NOT restore to 5.0.1 any more (both original and custom), unless you have saved your SHSH keys for 5.0.1. If you are on 5.0.1 you can jailbreak with redsn0w.
This is step-by-step instructions on how to perform untethered jailbreak of youriPhone 3GS on iOS 5.0.1firmware using RedSn0w 0.9.10 for Windows.
Untethered jailbreak means that each time you restart your device you will NOT need to connect it to a computer and run utilities.
Important: If you need unlock and have 05.13 baseband or lower - do not update to Apple firmware, use RedSn0w or Sn0wBreeze to create custom firmware!
If you need unlock Redsn0w will provide you with choice of updating your baseband to 06.15. If you have new iPhone 3GS that was made after 35 week of 2011 upgrading modem will not help to unlock.
Important: Please, consider reading our Jailbreak & Unlock FAQ, if you have other device or firmware and especially if you have questions or troubles.
Please think first, before you do something.
If you need carrier unlock - do not update to iOS 5.x firmware, use RedSn0w or Sn0wBreeze to create a custom firmware to preserve modem version!
Create a folder on your desktop (or any other folder on your computer) called Pwnage
Download the latest version RedSn0w 0.9.10b3 from here. Save it in the Pwnage folder.
Extract the redsn0w executable from the RedSn0w zip file into the same folder.
Connect your iPhone 3GS to the computer and launch iTunes.
Select your iPhone from the list of devices on the left. Create a backup by right-clicking on iPhone name in Devices (iTunes left pane) and choosing Back Up.
If you are already on iOS 5.0.1 you can now skip to step three.
Download iPhone 3GS firmware iOS 5.0.1 to Pwnage folder. It is better to use Firefox, because some browsers (f.e., Safari) extract ipsw:
You can update your baseband to the 06.15 version for carrier unlock. If you are on 05.14 or 05.15 or higher you will need to do this to unlock. You do not need to do this for jailbreak only. Please read the following very carefully before deciding whether to do this.
There is no way to come back down from baseband 06.15, and there’s no hiding the baseband version from Apple. You’ll be voiding your warranty in a very obvious way.
If some future baseband comes out with a critical fix, you won’t be able to update to it if it remains down in the 05.xx sequence (then again, you wouldn’t update to it if you wanted to keep your unlock anyway).
If you have 06.15 on your iPhone you won’t ever be able to restore to stock firmware (it will fail). You’ll need to only restore to custom IPSWs (then again, if you’re unlocker you should already be doing that).
Don’t update to 06.15 if you don’t need to, you can just jailbreak without unlocking using this tutorial! Only update baseband if you need the unlock and you’re stuck on baseband version 05.14 or 05.15, and you’re willing to assume the above risks. You can find out your baseband version in Settings -> General -> About -> Modem Firmware.
If you have read all above and want to update your modem to 06.15 select Install iPad Baseband.
Click the Next button to continue
RedSn0w will then begin uploading the new RAM Disk and Kernel.
Once this is complete you will be notified that RedSn0w is done.
When your iPhone 3GS finishes rebooting (5 minutes or so) it will be jailbroken with Cydia installed on the SpringBoard.
Run Cydia. Let it do all the necessary updates.
To have access to the root file system of your iPhone (via file managers like iFunBox or iPhone Explorer) install application called afc2add in Cydia.