As we all know that Apple has just released the new version of iOS 4.0.2, but for all those who are not satisfied, or want to downgrade to a pervious version of firmware can follow the guide below.
Important Note:
iPhone 3G users can downgrade using the following guide. iPhone 3GS/4 and iPod Touch 3G usersmust have to ECID with SHSH. Saurik saved in the serverand modify the hosts file in order to succeed in the procedure see below:
Requirements:
-The latest version of iTunes.
-The original firmware which you intend to downgrade to it from here.
-iRecovery and libusb for Mac or EasyiRecovery for Windows.
Modifying the hosts file:
For Windows:
-Open Notepad with Adiminstrative privilages, click on Start > All programs > Accessories then right click on Notepad then select open as Administrator.
-Now browse (C:/Windows / System32 / drivers / etc) in the Notpad and open the hosts file then add the following line at the end of the document and save it:
74.208.10.249 gs.apple.com
For Mac:
-Click “Go” -> “Go to Folder” and enter the path / etc /
-Find the file “hosts” and move it to your Desktop.Open the file by right click then open with Text Edit and add this string at the end:
74.208.10.249 gs.apple.com
-Save the file to your desktop and then drag it back into / etc / . We will request permission to overwrite and then also the administrator password.
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{ 3 comments… read them below or add one }
Thks for the info, I have a 3GS Iphone & 4.0.2, now wanna downgrade to 4.0.1. I have added 74.208.10.249 gs.apple.com, EasyIRecovery, shsh (4.0.1) original 4.0.1.ipsw. But don't know the procedure, please kindly show the demonstration.
i really want to downgrade so bad, but am not really confident in my ability…. ;/
i'm following you on twitter in case you'd like to walk me through.
i get confused when it comes to this part b/c i dont know how to right-click on my trackpad. ~~> For Mac:
-Click "Go" -> "Go to Folder" and enter the path / etc /
-Find the file "hosts" and move it to your Desktop.Open the file by right click then open with Text Edit and add this string at the end:
74.208.10.249 gs.apple.com
In Mac OS X:
why not just do a "sudo nano /private/etc/hosts" on a CLI (without the quotes) and copy and paste the address in a terminal?
ctrl-o and ctrl-x and its done and finished! (as an alternative)
avatar1349