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This is step-by-step instructions on how to perform tethered jailbreak of your iPhone 4 on iOS 5 firmware using RedSn0w 0.9.9b6 for Windows.

Tethered jailbreak means that each time you restart your device you will need to connect it to a computer and run redsn0w.

Note: If you have other device, here are links to our RedSn0w 0.9.9 iOS 5 jailbreak tutorials:

• Windows: iPhone 4 ^[2], iPhone 3GS ^[3], iPad 1 ^[4], iPod Touch 3G ^[5], iPod Touch 4G ^[6]
• Mac OS: iPhone 4 ^[7], iPhone 3GS ^[8], iPad 1 ^[9], iPod Touch 3G ^[10], iPod Touch 4G ^[11]

Important: Please, consider reading our Jailbreak & Unlock FAQ ^[12], if you have other device or firmware and especially if you have questions or troubles.

Important information.

Please think first, before you do something.

If you have iOS 4.3.3 firmware - you can do an untethered jailbreak using one of our tutorials ^[12].

If you need carrier unlock - do not update to iOS 5 firmware, use RedSn0w or Sn0wBreeze to create a custom firmware to preserve modem version!

Step One

Create a folder on your desktop (or any other folder on your computer) called Pwnage

Download RedSn0w version 0.9.9b6 or higher from here ^[13]. Save it in the Pwnage folder.

Extract the redsn0w executable from the RedSn0w zip file into the same folder.

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Step Two

Connect your iPhone 4 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.

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If you are already on iOS 5 you can now skip to step three.

Download iPhone 4 firmware iOS 5 to Pwnage folder. It is better to use Firefox, because some browsers (f.e., Safari) extract ipsw:

• iOS 5 (iPhone 4 GSM): iPhone3,1_5.0_9A334_Restore.ipsw ^[16]

For iPhone 4 CDMA everything is the same, but you should download iPhone 4 CDMA firmware: iPhone3,3_5.0_9A334_Restore.ipsw ^[17]

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Open iTunes. Now hold down Option (Mac) or Shift (Windows) key and click the Restore button.

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Navigate to the Pwnage folder on your desktop and select the iOS 5 firmware ipsw. Click the Open button to continue.

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iTunes will ask if you want to setup your iPhone as a new device or restore from the backup. Choose Restore from Backup if you want to preserve your contacts and other information.

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Step Three

Once iTunes has finished updating your iPhone 4 to the desired firmware open the Pwnage folder on your desktop and launch the redsn0w application from the redsn0w folder we extracted earlier.

On Windows Vista or Windows 7 right click the executable and set it to run as administrator in Windows Vista/XP compatibility mode.

Step Four

Once RedSn0w opens click the Jailbreak button

Step Five

Please plug your iPhone 4 into the computer and make sure its OFF then click the Next button

Step Six

RedSn0w will now guide you through the steps to get into DFU mode.

1. Hold down Power button for 3 seconds.

2. Without releasing Power button, hold down both the Home button and the Power button for 10 seconds.

3. Release the Power button and continue holding the Home button until RedSn0w detects the device (~15 seconds).

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If you have problems try again.

Step Seven

iPhone 4 will reboot and redsn0w will identify the firmware version.

Step Eight

RedSn0w will now prepare the jailbreak data.

Step Nine

From this window you can select the jailbreak options you would like.

Make sure Cydia is selected.

Click the Next button to continue

Step Ten

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

Step Eleven

Once this is complete you will be notified that RedSn0w is done.

When your iPhone 4 finishes rebooting (5 minutes or so) it will be jailbroken with Cydia installed on the SpringBoard.

Step 12: BOOT TETHERED

Once RedSn0w has finished you will need to boot tethered your iPhone 4. You will need to do it everytime you restart.

Rerun RedSn0w and this time select Extras button.

Click Just boot button (the first one).

You will have to put your iPhone 4 into DFU mode (just like on step 5-6):

Please plug your iPhone 4 into the computer and make sure its OFF then click the Next button

1. Hold down Power button for 3 seconds.

2. Without releasing Power button, hold down both the Home button and the Power button for 10 seconds.

3. Release the Power button and continue holding the Home button until RedSn0w detects the device (~15 seconds).

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If you have problems try again.

Now your iPhone 4 is jailbroken and working.

Step Thirteen

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.

Step Fourteen

Do not forget to change your default password ^[25] if you've installed openssh.

Step Fifteen

You can convert tethered jailbreak to a semi-tethered jailbreak using our tutorial from here ^[26].

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