How to Jailbreak Your iPhone 4 Using RedSn0w (Windows) [4.3.5]

Posted July 29, 2011 at 7:35am by iClarified | Please help us and submit a translation by clicking here | 322912 views
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These are instructions on how to perform a tethered jailbreak of iPhone 4 on the 4.3.5 firmware using RedSn0w for Windows. The Mac version of this tutorial is here. If you are on 4.3.3 or lower make sure you do NOT update to iOS 4.3.5. Use the untethered JailbreakMe instead. You can find the appropriate JailbreakMe tutorial here.

Those who want to unlock should make sure not to update without preserving their baseband.

Step One
Create a folder on your desktop called Pwnage

Download RedSn0w from 0.9.8b7b here and place it in the Pwnage folder. Likewise, download the latest 4.3.5 firmware from below and place it in the same folder.

4.3.5 (4 GSM): iPhone3,1_4.3.5_8L1_Restore.ipsw

Extract the RedSn0w zip file into the same folder.

Step Two
Connect your iPhone to the computer and launch iTunes.

Select your iPhone from the list of devices on the left. Now hold down Shift and click the Restore button. Restore is preferred as it won't create any wasted space on your iPhone.

Navigate to the Pwnage folder on your desktop and select the 4.3.5 firmware ipsw. Click the Choose button to continue.

Step Three
Once iTunes has finished updating your iPhone to the desired firmware open the Pwnage folder on your desktop and launch the redsn0w application from the redsn0w folder we extracted earlier.

**Windows 7 users should run the redsn0w executable mode as an administrator in Windows Vista compatibility mode. You can do this by right clicking the executable and selecting Properties from the contextual menu.

Step Four
Once RedSn0w opens click the Browse button

Step Five
Select the 4.3.5 firmware ipsw we placed in the Pwnage folder on our desktop then click Open.

Step Six
Once the firmware has been verified click the Next button to continue.

Step Seven
RedSn0w will now prepare the jailbreak data

Step Eight
From this window you can select the jailbreak options you would like. Make sure Cydia is selected and click the Next button to continue.

Step Nine
Please plug your iPhone into the computer and make sure its OFF then click the Next button

Step Ten
RedSn0w will now guide you through the steps to get into DFU mode. You can find more help with DFU mode here

Hold down both the Home button and the Power button for 10 seconds.

Release the Power button and continue holding the Home button until RedSn0w detects the device.

Step Eleven
Your iPhone will now reboot

Step Twelve
RedSn0w will then begin uploading the new RAM Disk and Kernel.

Step Thirteen
Once this is complete you will be notified that RedSn0w is done. Click the Finish button. When your iPhone finishes rebooting (5 minutes or so) it will be jailbroken with Cydia on the SpringBoard.

Once RedSn0w has finished jailbreaking your device you will need to boot it tethered. Rerun RedSn0w and this time select Just boot tethered right now from the list of options instead of installing Cydia.

*As usual a big thanks to the iPhone Dev-Team for their hard work and contribution to the iPhone community.
**Windows 7 users may want to try running the redsn0w executable mode as an administrator in Windows Vista compatibility mode if you experience any trouble.

Add Comment
itaymis - April 7, 2013 at 7:29pm
try this one, I have unlocked my phone there. very fast service (about 6 hours total) and cheap, now i can update to any version without having to worry that my phone will be locked ever again. Only 9.99 for phone unlocks!
krejzibijach - November 3, 2011 at 10:35pm
Hello, JB worked, but now I don't have signal on my Iphone 4 4.3.5(8L1) 04.10.01. I used this tutorial to JB. In "about" Carrier and Network is "Not available". Is there help for me? Thank you.
Linas - November 1, 2011 at 8:12pm
Hi, i have used this jailbreak and now i cant unjailbreak, or upgrade to ios5. My iphone details: Iphone 4 baseband 04.10.01 Version 4.3.5 (8L1) When i try to update to ios 5, i get error: the iphone could not be resored an unknown error accured 3194 treyd solution with host file, tryed different ipsw older version, tryed deactivating with red snow with no luck, so not sure how should i get out of this mess as i dont want to be using unthetered iphone anymore, i just want to update without any jailbrak to the newest ios. Anyone suggestions? Thank you in advance !
luisa - September 29, 2011 at 3:13am
hey, I have a problem, in Step 2, when I try to restore mi iPhone using the firmware I just downloaded, I get an error message saying that the firmware I''m trying to install is not compatible... does anybody knows why this happens? and what I can do to solve it? I have an iPhone 4 with 4.3.5, thanks a lot!!
ASSMAN (FATHER TO FECES) - September 29, 2011 at 12:03pm
elaine - September 23, 2011 at 12:38pm
i use the version 4.3.5,but everytime i of my device,can't to restart back,must use the reboot to restart back the phone...
20 More Comments
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