These are instructions on how to perform a jailbreak of your iPhone 3GS on the 4.3.5 firmware using RedSn0w for Mac. 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 jailbreak with PwnageTool or Sn0wBreeze rather than RedSn0w to avoid updating their baseband. Please note this is a tethered jailbreak for those on the new bootrom.
Step One
Create a folder on your desktop called Pwnage
Download RedSn0w 0.9.8b7b from 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 (3GS): iPhone2,1_4.3.5_8L1_Restore.ipsw
Extract the RedSn0w zip file by double clicking it.
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 Option 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.
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.
You will be prompted to indicate if this is a newer model of the iPhone 3GS.
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.
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.
BOOT TETHERED
Once RedSn0w has finished jailbreaking your device you will need to boot it tethered if you have the new bootrom. 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.
Those who want to unlock should jailbreak with PwnageTool or Sn0wBreeze rather than RedSn0w to avoid updating their baseband. Please note this is a tethered jailbreak for those on the new bootrom.
Step One
Create a folder on your desktop called Pwnage
Download RedSn0w 0.9.8b7b from 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 (3GS): iPhone2,1_4.3.5_8L1_Restore.ipsw
Extract the RedSn0w zip file by double clicking it.
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 Option 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.
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.
You will be prompted to indicate if this is a newer model of the iPhone 3GS.
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.
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.
BOOT TETHERED
Once RedSn0w has finished jailbreaking your device you will need to boot it tethered if you have the new bootrom. 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.
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