Downgrade iPhone/iPod Touch From Firmware 4.0 (iOS 4) to Firmware 3.1.3


Ahead of you begin the academic beneath, notice that customers iPhone 3G and iPod Contact 2G could downgrade thei
r firmware by way of following the educational under.
 Customers iPhone 3G and iPod Contact 3G, on the other hand, will need to have up to now registered ECID their certificates 
on the server Saurik and regulate their hosts file to practice the process.

Edit the Hosts file:

 Home windows

  1. Open the laptop as administrator (proper click on on the Notepad icon and click on “Run as administrator”;
  2. In Notepad, choose File> Open, and go to the folder C: / WINDOWS/system32/drivers/and many others
     and open the hosts file;
  3. Add the next line on the finish of the record and put it aside:

    seventy four.208.10.249




    1. Click on “Go” -> “Jump to file” and enter the path / etc
    2. Open the file with TextEdit, add the following and save the file to your desktop:


Go to file /and so on and changing the unique
file (in case you are precipitated for a password, click on OK)

Mac Tutorial:

1. iRecovery Replica the appliance on the computer of your pc and set up “libusb”.

2. Open iTun
es, click on the ALT key + Repair and manually loaded the unique firmware three.1.three

three. All the way through the restoration course of, a popup will show the error 1015, don’t worry it can be customary.

four. Click on OK to shut the pop-u.s.a.and shut iTunes.

5. Open Terminal and kind the next instructions (press between every line)

cd Pc. /-s iRecovery setenv auto-boot proper saveenv fsboot (whether it is an iphone formally activated) exit

6. Wait a couple of seconds and disconnect the iPhone, then restart your cellphone via clicking on the buttons concurrently House + Energy

7. Whilst you see the Apple emblem seems on display, join your new telephone to the pc and proceed usually to the activation thru iTunes. The downgrade is full, you’ll be able to be again in three.1.three

Tutorial Home windows XP:

1. iRecovery Extract the file and replica the appliance for your computer.

2. Set up “libusb-win32-filter-bin-zero.1.12.1.exe” and preserve the file in your  your computer. **

three. Join your iPhone by means of USB and put it in DFU mode (dangle the button “Energy” and “House” for best 10 seconds after which unencumber the ability button);

four. Restoration three.1.three firmware manually (press Shift + Restoration and choose the firmware you downloaded prior);

>5. Right through the restoration course of, a popup will show the error 1015, don’t worry it is commonplace.

6. Click on OK to shut the pop-united statesand shut iTunes.

Run the DOS command (of booting> run> sort CMD) and kind the next instructions:

Personal computer iRecovery.exe cd-s setenv auto-boot actual saveenv fsboot   exit

7. Unplug the iPhone out of your laptop and restart it by means of concurrently urgent the keys Energy andHome unless the Apple brand seems. Reconnect your telephone to the pc and proceed generally to the activation thru iTunes. The downgrade is full, you can be again in three.1.three

Tutorial Home windows Vista and Seven:

Obtain and extract the file iRecovery. There are three information within, Together with file libusb restore.exe.

Open the folder HARDWARE ADD WIZARD, join the iPhone to the pc and run Wizard.exe inf

click on Subsequent and make a choice from the record “Apple Cellular Software USB Driver”, click on “Subsequent” and “N
ext” once more and shop the file you simply created as MYSETUP.inf

Then go to begin run and hdwwiz.exe, a window opens, make a selection “Set up the hardware that I manually choose”. SELECT “Exhibit all units”, then the driving force of the iphone, the place the hunt recordsdata MYSETUP in the past created and choose it!Set up the motive force, click on the OK button and proceed even though a warning window seems.

then go to the folder “Set up LibUSB, proper click on on” libusb 32win SETUP.EXE “> Residences and alter the compatibility with” Home windows XP Provider % 2 “then validated cliq ‘Run as Administrator” and set up it.

Now run the file “libusb repair.exe” within the root folder (as administrator) and click on first on “set up batch” then c
lick “set up watermark repair”, make a choice “English”, then “add to tcpip.sys ” 

And you are achieved!

Which you can now use iRecovery for restoring your iPhone in Home windows Vista and Seven. During the method, you are going to be caused a couple of instances to restart the PC. Don’t restart no longer!

Obtain iTunes 9.2

Obtain Firmware three.1.three: iPhone / iPod Contact

Obtain v1.three for Mac iRecovery

Obtain libusb library for Mac

Obtain iRecovery libusb 1.three + for Home windows XP

Obtain iRecovery libusb 1.three + for Home windows Vista and Seven

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