Downgrade Iphone 4 iOS 4.2 – iOS 4.1

iOS 4.2 is coming up soon [ iOS 4.2 Release Date Update ] with beta iOS 4.2.1 released two days ago for Iphone 4 3GS 3G and iPod Touch [ all versions ] . Since the jailbreak for iOS 4.2 beta is ready using RedSn0w Jailbreak Tool , there are many reasons you may want to upgrade to iOS 4.2 [iOS 4.2 Features].

In this post I will explain how you can downgrade to older iOS 4.1 from iOS 4.2 . Please follow the steps below to proceed with the downgrade .

iphone_4_downgrade ios 4.2

Please Note : You must have saved older SHSH Blobs for your device before proceeding with the downgrade . [ Read : How-to Save SHSH Blobs ]

Steps to downgrade iOS 4.2 to 4.1 :

  1. Download old .ipsw firmware files on your computer [ Download iOS 4.1 ]
  2. Put your device in DFU mode [ Read : How-to put iphone in DFU Mode ]
  3. For Iphone 4 3GS only – Windows Users navigate to : C:\Windows\System32\drivers\etc\ and locate “hosts” file as shown in the image below .iphone_4_jailbreak
  4. At the bottom of the hosts file add the following text as shown in the image below . [ this is for itunes to believe that we are connecting to Apple Servers when we are actually trying on Saurik’s Server where your SHSH Blobs are saved – Pretty Awesome , isnt it ]hosts-notepad_windows If you are having issues editing the file , open Notepad in Administrator mode by right clicking on the Notepad app icon and selecting “Run as Administrator” as shown in the image below .open as administrator iphone 4Same applies for MAC users , they must have Full Read Write access to their account . Search the hosts file in “/etc/” directory and then editing host file using Text Edit .
  5. In this step you will have to connect your device and restore to the old firmware you downloaded in Step 1 using iTunes . This is very easy , you have to press left Shift [Windows] or Alt Key [Mac] while your iTunes is running on your computer and press restore as shown in the image below iphone 4 restore
  6. iTunes will now ask you to choose the location of the downloaded .ipsw file [Firmware file]. Select and let the restore process begin.

Please Note that you may get error 1004 or 1015 .  This is normal and wont affect the restore process . Now kick  your device out of Recovery Mode screen [which shows connect to iTunes] using TinyUmbrella or RecBoot . After the restore process is completed , open the hosts file that you edited and remove the last line added .

Please let us know how this tutorial go for you . Dont forget to share the article with your friends and join us on Facebook for more future upgrade tips and tricks .