These are instructions on how to jailbreak your iPhone 3GS or iPhone 4 on iOS 5.0.1 without updating the baseband using RedSn0w for Windows. You may want to do this to preserve an unlock from a lower baseband version.
Please note this jailbreak is tethered for every device but the old bootrom iPhone 3GS which means you will need to connect your device to the computer each time you reboot.
1.Create a folder on your desktop called Pwnage
Download RedSn0w and place it in the Pwnage folder. Likewise, download the 5.0.1 firmware from here and place it in the Pwnage folder.
Extract RedSn0w by double clicking it.
2.Launch the redsn0w application from the redsn0w folder we just extracted.
3.Click to select Extras from the main menu.
4.Click to select Custom IPSW from the Extras menu.
5.Navigate to the Pwnage folder on your desktop and select the IPSW we downloaded then click Open.
If you are using the iPhone 3GS you may be asked to identify whether you are on a newer or older model.
6.RedSn0w will now begin building a custom IPSW for you.
7.You'll be notified once RedSn0w has completed building your IPSW. Click the OK button.
9.Plug your iPhone into the computer and make sure its OFF then click the Next button
10.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.
11.RedSn0w will run the LimeRa1n exploit.
12.You'll then be notified that your iPhone is in Pwned DFU mode.
13.Launch iTunes .
14.Select your device from the list on the left then under the Summary tab hold down the Shift key and click the Restore button.
15.You will then be asked to select your IPSW for restore. Navigate to the Pwnage folder on your desktop and select the IPSW that begins with NO_BB then click the Open button.
16.iTunes will now restore and jailbreak your device using the Custom IPSW.
BOOT TETHERED
Once you have jailbroken you will need to rerun redsn0w to boot tethered.
- From the main RedSn0w menu click the Extras button.
- Select Just boot from the Extras menu to just boot tethered.
UNLOCK:
If you have a supported baseband you can now install UltraSn0w to unlock your device. Instructions are here.
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