28-03-2021

In this guide you will learn how to jailbreak iOS 4.2.1iPhone 4, 3GS, 3G using RedSn0w on Windows. Just follow the step-by-step instruction to jailbreak iOS 4.2.1. See more jailbreak guides.

So if you want to know What Redsn0w 0.9.12b1 Untethered Jailbreak can do to Hack, Unlock and Jailbreak iOS 5.1.1 for iPhone 4S, iPhone 4, iPhone 3GS, iPad 3, iPad 2, iPad 1, iPod 4G Touch and iPod 3G Touch devices and how it gives full access to your Apple iDevices just follow the following simple steps and guidelines to Untethered Jailbreak your iOS 5.1.1 and A4 and A5 devices with Redsn0w 0.9.12b1 Tool. IPhone 4S; Other files you need to install redsn0w – Download iOS firmware file for your device – iTunes – Bootloader files V3.9 (BL-39.bin) and V4.6 (BL-46.bin) Here is a video demo of using redsn0w on the iPhone with Windows.

  1. While the iPhone 4 and 3GS users will have to wait for a new jailbreak tool, iPhone 3G users who doesn't rely on an unlock can jailbreak their phone on iOS 4.0.1 using Redsn0w 0.9.5b5-5. Again, this is strictly for iPhone 3G only. If you rely on ultrasn0w carrier unlock, DO NOT update to iOS 4.0.1 until further notice.
  2. A Lot Of 2 iPhone 4S Verizon Unlock One Black One White 16 Gb With One Charger. Condition is Used. The white one won’t hold a good charge but will work you can activate it or use it for parts either one of them but they both work. Seller assumes all responsibility for this listing.

Important:

  • Tether jailbreak: iPhone 4, iPhone 3GS (new bootrom), iPod touch 2G (MC Model), iPod touch 3G, iPod touch 4G. Tethered jailbreak for newer models, means if you reboot the device then to boot back into jailbreak state you need to connect your device with computer and boot it using RedSn0w.
  • Untether Jailbreak: iPhone 3G, iPhone 3GS (old bootrom), iPod touch 2G (Non-MC)
  • Unlock for iOS 4.2.1 is not available yet so keep away from jailbreak if you need to unlock your device as well.

Step-1

Unlock Iphone 4s Online

Unlock

Download and restore iOS 4.2.1

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  • Download iOS 4.2.1 for your device.
  • Download Redsn0w.

Step-2

Run iTunes and select your device from left pane.

Step-3

Iphone 4s unlock free

Hold down the Shift key from keyboard and hit the Restore button.

Select the iOS 4.2.1 firmware ipsw file that you have downloaded and hit the Open button. Let the iTunes finish the update process.

Settings

Jailbreak iOS 4.2.1

Step-4

Extract the downloaded redsn0w_win_0.9.6b4.zip file and run redsn0w.exe file.

Step-5

Hit the “Browse” button and select the iOS 4.2.1 firmware ipsw. Spider man edge of time controls.

Step-6

When IPSW successfully identified, hit the “Next” button and let the redsn0w prepare jailbreak data.

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Unlock

Step-7

Network Unlock Iphone 4s Free

Check the “Install Cydia” option and hit “Next”.

Step-8

Make sure your device is plugged into computer and Turned Off as well, hit the “Next” button.

Step-9

Now put your device into DFU mode, redsn0w will guide you to do that. Read the on screen steps to put your device into DFU mode.

Redsn0w will start jailbreak process, wait for the Done! message and then hit the Finish button.

When your iPhone finishes rebooting, now your iPhone is Jailbroken and you can find Cydia icon on springboard.

To reboot tethered jailbreak device, Check “Just boot tethered rignt now” option and hit Next button.

Thanks to Dev-Team 🙂

See also:

Online

Unlock Iphone 4s Att

  • Jailbreak iOS 4.2.1 Untethered with GreenPois0n RC5

Unlock My Iphone 4s For Free

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