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Monday, November 1, 2010
How To : Use redsn0w 0.9.6b2 To Enter DFU and Use Custom Firmware in Windows
Posted by iambl0gger | Under Gadgets, Tutorials

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iPhone Dev Team today released redsn0w v0.9.6b2 for Windows. It's good news for people using Windows and want to use custom IPSW on their iDevice. As you may know, iPhone Dev Team releases PwnageTool to create Custom Firmware (IPSW) and use it in your iDevice via iTunes. PwnageTool is released only for Mac till date (And it will be released for Windows soon) so Windows users does not get to use custom IPSW. Actually they can use them by downloading from somewhere which are created using PwnageTool, but in most cases, they don't work with Windows. The reason is, your iDevice must enter DFU mode by PwnageTool only. If you enter DFU mode manually and use iTunes to restore Custom IPSW, you will get error 160, 1604 or so. So what to do?

With the help of today's redsn0w for Windows release, Windows users can enter DFU mode, and use Custom IPSW. In this tutorial I will show how to use redsn0w 0.9.6b2 to enter DFU mode and use Custom IPSW.

What is Custom Firmware (IPSW)?
Custom Firmware are modified firmware. They are modified to Jailbreak your device, give you increased root partition and to have your device Activated in case if you don't have/use official carrier SIM. They also helps you to "Preserve" your baseband so you can use ultrasn0w to unlock your device. For example, if you are on iOS 4.0.1 and baseband 5.13.04 which is the last unlockable baseband at the moment, you can use Custom IPSW having option to preserve your baseband and you can upgrade to iOS 4.1 with the baseband of iOS 4.0.1 (5.13.04) and unlock your device using ultrasn0w.

CAUTION : You are advised to follow this tutorial on your own risk. It may get your device in DFU loop if something goes wrong. You can't blame us if ANYTHING goes wrong with your device. Go ahead only if you know what are you doing.

Note : DO NOT ask me where to get custom IPSWs.

Things you'll need.

iDevice with iOS lower than 4.1 (Stock) (for those needing soft unlock)
or baseband lower than 5.14/2.10 to be able to unlock using ultrasn0w.
USB cable
iTunes max on 10.0.1.22
redsn0w for windows v0.9.6b2 (Download link at the end)
Stock firmware for your device which is 4.1 OFW
Custom firmware for your device (4.1)

Things used in this tutorial

iPhone 3GS
iTunes 10.0.0.68
Windows 7 x86

Using redsn0w and entering DFU mode

Step 1

Download and run redsn0w.exe
The home screen looks like this



Click Browse and browse to the Stock firmware (4.1 OFW) and select it.
It will ask you if your iPhone 3GS is new model or old one (other device users can skip it as you won't see this message)
Click yes if you have iPhone 3GS (new bootrom) model or No if you have (old bootrom) model.



Step 2

Click Next
Now redsn0w will apply kernel patches





Step 3

redsn0w will now display 3 options.
1. Install Cydia
2 Just boot tethered right now
3. Just enter pwned DFU mode right now.



Select the third option.
Click next

Step 4

Read the message on the screen carefully.
Connect iPhone to PC if not done already.
Power Off iPhone and click next.



Step 5

Now follow the on screen instructions.
You must follow them correctly in order to enter DFU mode properly.



If you didn't do it right, it will show you message that you probably misunderstood the instructions. If so, click OK and start again.



When you'll get in DFU correctly, it will start process again. Once done, it will show message that your device is in pwned DFU mode.



Click finish



Step 6

Open iTunes,
It will say that it has detected iPhone in recovery mode. Click OK.
Now Hold SHIFT key on your key borad and click the Restore button in iTunes.
Now release the SHIFT key and browse to the custom IPSW file and select it.
iTunes will start process of restoring your device to that firmware.
This process is same as other restore process and once done, you will get Jailbroken iPhone. If you downloaded Activated IPSW, then your iPhone will be activated as well.

Update : If you want to keep your current baseband, and if you have iPhone 4, you can use latest TinyUmbrella. If you are on other devices, you can get a custom firmware cooked with PwnageTool with having "Preserve Baseband" option checked. You can tell a friend of yours to create a custom firmware for you, or you can search for it.

Download redsn0w 0.9.6b2

Source: wearetheblogger.blogspot.com/2010/11/how...b2-to-enter-dfu.html

Thanks for the tutorial Sir Justin k+ bro.

1. Update iTunes to 10.1 or later. Now start iTunes and sync your iPhone with your PC/MAC so that it backs-up all your important data including settings, apps, music, contacts and photos.

2. Download Redsn0w 0.9.6b2. Up to b6 is ok.

3. Download 4.1 OFW (links here), and 4.1 CFW (Unhacktivated if FU or using orig sim or activating via onesim, Hacktivated if no orig sim or no onesim. Create your own CFW. For links, just asks us in LC

4. Run Redsnow. Browse and point to 4.1 OFW. Wait for the file to be identified, once done click next.

5. Select "Just enter pwned DFU mode right now". Make sure you are connected to you PC. Regardless on where your device is at now, Hold sleep button ang home button then count exactly to 10 seconds. Release sleep button while continuing to hold home button for 10 more seconds or until you hear a sound or itunes detects it in recovery mode. Press Next twice and wait until it says finish. You should now be in RS induced DFU mode (screen should be blank).

6. Using iTunes, click Shift+Restore and select 4.1CFW. Let it restore and reboot. Done. Your iphone should be on jailbroken, untethered 4.1 now. Fire up Cydia (make sure you're connected via WI-FI).

7. Install Ultrasn0w to unlock.


NOTE: You have to do this if you want to preserve your baseband, or if you are somehow on bb6.15 already.

NOTE 2: This works also you need to restore and upgrade to 6.15 baseband at the same time too. If you need a CFW with 6.15 baseband, ask us in LC or create your own using pwnagetool. (if your baseband is below 5.13, don't update to 6.15. IP4 has not unlock yet and no baseband update either)


UPDATE: I edited the post. Apple stopped signing 4.1 already so this tutorial will only work now IF YOU HAVE SAVED YOUR 4.1 SHSH.

Great tutorial Ranns!
FAQ tab now updated with this tutorial.
+1 Karma

thanks for this thread. it works with 4.3.3
i used redsn0w_win_0.9.6rc16
then change all os4.1 to os4.3.3
+1 karama for this thread
thanks sir ranns!