How to Restore iPhone 4, 3GS on iOS 4.0.1 Successfully, Bypassing iTunes 1004, 1015 Error

So you have an iPhone 4 or iPhone 3GS (New Bootrom), running iOS 4.0.1, with SHSH blobs saved on Cydia, and you want to restore your iPhone again to iOS 4.0.1. Now that Apple has stopped signing iOS 4.0.1, you wont be able to restore your iPhone 4 on iOS 4.0.1 by simply pointing iTunes to iOS 4.0.1 ipsw file. Because if you do so, iTunes will throw an error: “This iPhone [your name] iPhone could not be restored. This device isn’t eligible for the requested build.

Fix iOS 4 YouTube, iBooks and iTunes Restore Error Problem with Sn0wbreeze 1.6.2 [Jailbreak]

Sn0wbreeze 1.6.2 has just been released. This new update brings fixes for YouTube, iBooks and iTunes Error 2 which has been problematic for most users after iOS 4 jailbreak. Apart from this, this new version also brings support old bootrom Spirit jailbreak toolusers who can now jailbreak their device on iOS 4 with Sn0wbreeze.

For those of you who don’t know, Sn0wbreeze for Windows is like PwnageTool for Macwhich can be used to create custom pwned ipsw firmware files which can then be restored on iOS devices without upgrading their baseband.

sn0wbreeze V1.6.2 is live –> http://ih8sn0w.com <– Old-Bootrom Spirit’d users will be happy! =)

Instructions to jailbreak iPhone 3GS (old bootrom), iPhone 3G and iPod touch 2G (non-MC model) on iOS 4 using Sn0wbreeze 1.6.2 as usual are exactly similar to the last release. Please read all the instructions posted here carefully before upgrading and jailbreakingyour phone on iOS 4.
Once you have jailbroken your phone, you can unlock it using ultrasn0w 0.93 (on anybaseband), guide for which is posted here.
Download Sn0wbreeze V1.6.2 for 4.0 [Windows]
You may also like to check out:

• Fix iBooks After iOS 4 Jailbreak with Redsn0w 0.9.5b5-4
• Fix iPhone iOS 4 MMS / APN Issue After Jailbreak with Redsn0w 0.9.5b5-5
• How to Unlock iOS 4 with Ultrasn0w and Blacksn0w on 05.13.04 Baseband [Guide]
• How to Jailbreak iOS 4.0 on iPhone 3GS, iPhone 3G and iPod touch 2G using Redsn0w, PwnageTool 4.0 (Windows)

You can follow me on twitter to keep yourself updated on all the latest jailbreaking and unlocking releases.

Source: redmondpie