Sunday, March 18, 2012

How to jailbreak iPhone after installing iOS 5.1 using redsn0w on windows

How to install iOS 5.1 and jailbreak iPhone 4 on Windows using redsn0w

This tutorial is for windows only. A complete guide on how to install iOS 5.1 and jailbreak iPhone 4 on Mac has been discussed here. This tutorial guide you through the process of installing iOS 5.1 on iPhone 4 and jailbreaking it using redsn0w.

Upgrading your iPhone to iOS 5.1 through iTunes will update your baseband, removing your chances for an unlock. Please follow this tutorial on how to update to iOS 5.1 using a custom ipsw which prevents your iphone baseband from getting upgraded, if you rely on ultrasn0w unlock. This jailbreak for iOS 5.1 is tethered which means you will have to connect your device to the computer everytime you reboot.
how to jailbreak ios 5.1 using redsn0w

If you want to create a backup of your iPhone data before upgrading to iOS 5.1 then follow this guide. 

Before we begin with the guide make sure you download and save the following on your desktop.

  • Latest version of Redsn0w : Download link :
  • iOS 5.1 : Download link :
Once you have downloaded Redsn0w and iOS 5.1, place them in one folder for your convenience. Extract the redsn0w archive and you should be able to see 5 extracted files from that archive like the below screenshot.

how to boot tethered using redsn0w on windows

Step 1 : If your device is already on iOS 5.1, skip this step and proceed with the next step.

Connect your iPhone to your computer and launch iTunes. Select your iPhone from the list of devices and press down the shift key and hit the restore button on iTunes. You should now see a pop-up asking you to point towards your iPhone firmware iPSW file. Point iTunes to the folder where you have downloaded the iPSW and the restore process will begin. 

iTunes will now update your iPhone to iOS 5.1.

Step 2 : Once iTunes have updated your iPhone, launch redsn0w (make sure you run redsn0w as administrator by right clicking on it and selecting - "Run as administrator")

Step 3 : In redsn0w select the option 'Jailbreak' and then turn off your iPhone and click next.

how to get into dfu mode using redsn0w for windows

how to enter dfu mode to jailbreak iphone 4 using redsn0w

Step 4 : Follow the onscreen instructions to enter DFU mode. It is very important that you follow the instructions very carefully.

Instructions For Getting Into DFU Mode

  • Switch off your iPhone
  • Hold the power button for 3 seconds
  • Now, without releasing the power button also press and hold the home button for 10 seconds.
  • Without releasing the home button, release the power button but continue holding the home button until your device enters DFU mode and you redsn0w automatically detects it.

how to jailbreaking iphone 5.1 using redsn0w

how to jailbreak iphone 3gs on iOS 5.1 using redsn0w

how to jailbreak iphone 4 5.1 using redsn0w

how to redsn0w boot tethered

Wait for redsn0w to exploit your iPhone using limera1n to enter pwned dfu.

Step 5 : Select Cydia and click next. Redsn0w will reboot your iPhone and upload kernel data. Once done, it will notify you that the current jailbreak is tethered and will require you to connect your iphone to redsn0w everytime your iPhone is rebooted.

how to jailbreak iphone 4

untethered jailbreak for iphone 3gs

how to reboot tethered

entering dfu mode and rebooting tethered

How To Boot Tethered

  • Launch Redsn0w and click extras.
  • From the extras menu, select Just Boot to boot into tethered mode.
Check the screenshots for details

go into dfu mode using redns0w to boot tethered

jailbreak iphone 4 and iphone 3gs using redsn0w on iOS 5.1

Guide to help you back up your iPhone data
Guide to update iPhone without upgrading the baseband

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