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iDownFirm: Downgrade iOS 4.0.2 to 4.0.1

by Dcrack / August 16, 2010 12:02 AM EDT

Hello iPhone user, iDownFirm is a program that will allow you to downgrade your device more easily; that is, instead of following complicated steps, you will only have to press two buttons.

iDownFirm performs the downgrade from firmware 4.0.2 to 4.0.1, having the ECID or SHSH saved.

Available in 3 languages: Spanish, English and Italian

Tested on all Apple devices (Working)


Requirements:

  • Having Windows
  • Have the .NET framework 4.0 installed

Download .NET framework 4.0:

Download iDownFirm for Windows:

Tutorial on how to use the tool:

  • Step 1: First, you must install the .NET Framework 4.0 (Download in the Requirements). After installation, you will be prompted to restart your computer. This is important because if you do not restart, the changes will not take effect and the installation will not be completed.
  • Step 2: Connect your device to the computer
  • Step 3: Download the program and extract the entire folder
  • Step 4: Open the program (iDownFirm.exe) and select your language

  • Step 5: Press Downgrade Firmware! (Spanish)

  • Step 6: Go to iTunes and restore by pressing Shift + Restore and selecting the firmware downloaded earlier.


  • Step 7: When iTunes throws error 1015, press the Exit button. Error 1015!