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TUTORIAL - Failsafe method to restore the current version of IOS

f4780y

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Welcome to the iPadForums.net tutorial on the failsafe method to restore the current version of IOS on your device.

From time to time our iPads do get messed up and you want to get the device back up and running on the latest firmware so you have a fresh platform to start over. This guide will help you get your device restored with the latest firmware whilst avoiding most of the common iTunes errors along the way. :D

NOTE: - You should only try this guide if you are getting errors when trying to restore IOS on your device. If you haven't tried yet, simply connect your device to iTunes and press "restore". 99% of the time this will succeed! Even for a jailbroken iPad! Go on, give it a go first!

1. Update iTunes to the latest version
If you are going to install the current version of IOS reliably, make sure you are running the latest version of iTunes. Use the "Check for updates..." menu item in iTunes.

To restore 7.x IOS you must be on at least iTunes 11.1 or newer...

2. Fix Hosts File ( this step is normally for jailbreakers only to resolve error 3194)
If you are absolutely SURE that nobody that has used the PC you will be using will have ever messed with the hosts file, or jailbroken a device on the PC you are using, then you can probably skip this step only, but you MUST continue with all other steps. If in doubt, or you are getting Error 3194 you should do this step.

Lots of iPad owners mess with their hosts file but don't really understand the changes that have been made or why they made them.
Usually, the hosts file is changed to allow an older firmware to be installed by using SHSH Blobs from Cydia. Having a hosts file which is pointing towards Cydia and not Apple is probably the number one cause of issues when trying to restore a device. Normally, this gives an iTunes Error 3194. To make sure your hosts file is pointing back to Apple, follow this process:

  • Download the latest version of TinyUmbrella from here - The Firmware Umbrella - TinyUmbrella
  • Once downloaded, start the TU program
  • Switch to the "Advanced" tab
  • UNTICK the option which says "Set Hosts to Cydia on Exit"
  • Close TinyUmbrella - We will not use this application again during this process, so make sure it is closed.

Alternatively, if you know what the "hosts" file is and how to edit it manually, remove ALL references to gs.apple.com from the file and save it.

  • On Windows the hosts file can be found in: C:\Windows\System32\drivers\etc\hosts
  • On OSX the hosts file lives in /private/etc/hosts

When editing the hosts file in Windows, you may need to use Explorer to show both hidden & system files and then launch your editor (e.g. Notepad) with Administrator privileges by right clicking on it and choosing "Run as Administrator", otherwise you won't be able to edit and save the file.

3. Download the IOS firmware IPSW file to your desktop
iTunes is not very forgiving when it comes to unreliable internet connections or times when the download servers are being put under a lot of strain, e.g. when a new firmware is released. Therefore, it is usually best to download the firmware file directly to your desktop and then direct iTunes to use it.

Download the latest version of IOS for your device from our sticky here - http://www.ipadforums.net/ipad-hacking/24939-official-apple-ios-firmware-download-links-ipad.html

NOTE: - This tutorial does not cover installing an old version of IOS on your device. You can only use this guide to install a version of IOS on your device which Apple is currently signing. The current version may not be the version you have installed. DO NOT BE TEMPTED TO PICK AN OLDER VERSION WHICH YOU KNOW IS NO LONGER BEING SIGNED! It will not work using this method.

If you are using Windows and Internet Explorer, make sure you rename the file back to have an extension of IPSW if it gets renamed with ZIP. This is a fault of Windows and IE, and nothing to do with Apple! You could also consider using a better browser such as Chrome or Firefox to avoid this issue altogether... ;)

4. Put your device into DFU mode
Restoring a device by just connecting it to iTunes and pressing restore will only work if the iPad is working properly. Invariably, and especially if you are looking at this post, something has gone wrong before you got here, so it is unlikely that a normal restore will work. In order to get the restore to complete normally, you MUST put your device into DFU mode.

In order to put your device into DFU mode, with the iPad connected to your computer and turned on, you must press the "home" and "power" buttons together for EXACTLY 10 seconds at which point you must release "power" but continue to hold "home". After about 15 seconds, the device will enter DFU mode.

Once your device is in DFU mode the screen should be blank. If anything else is showing on the screen, such as the "connect to iTunes" logo, you got it wrong. You must get the device into DFU mode successfully. Don't be tempted to release the button when the screen goes blank at the 7 second mark. You must hold the buttons for exactly 10 seconds! Try again :)

If you need more help with DFU mode, see our guide here - http://www.ipadforums.net/ipad-hacking/27489-dfu-mode-dummies.html

5. Temporarily Disable 3rd Party Tools
Sometimes, 3rd party apps such as firewalls, anti-viruns, and anti-malware software can interfere with the restore process, particularly on Windows. If you are having trouble with 15xx and 16xx errors this is often the cause. It's best to temporarily disable all these on your PC whilst you carry out the restore. VMWare services have been know to interfere with a restore too. Disable everything you possibly can!

6. Manually restore in iTunes
Finally, you are ready to restore your device using the firmware you downloaded in Step 3. Make sure it has completed the download of course! ;)

Open iTunes and it should report that it has discovered a device in recovery mode and must restore it. Good! That's exactly what we want. Click the OK button to dismiss the dialogue box.

Now you must Shift-Restore (Windows) or Option-Restore (OSX) to select the firmware you downloaded. This means you must hold down the shift key (on Windows) or the option key (on OSX) on your keyboard whilst clicking the "Restore" button in iTunes with your mouse. If you do this correctly, an Explorer or Finder window will pop up and allow you to navigate to the firmware file you downloaded in Step 3. Find the file and choose it for the restore.

Done! iTunes should now restore your firmware file on your iPad without any errors.

If you run into problems make sure you followed all the steps correctly and also check you are not connecting via a USB Hub. Always connect directly to your PC. Try a different USB port and if possible a different cable, particularly if you are not using the original cable that came with your iPad. Yes, not all cables are the same, even official ones, and iPhone cables can cause problems sometimes!
If it still fails after this, post details of the error message and we'll see if we can help.

Any comments or suggestions on how to make the process even more failsafe are welcome :)
 
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hi man me again I tried this and I got Error code 21 this time Error 20, 21, 34, 37: These errors typically occur when security software interferes with the restore and update process. If you are using a PC, follow this article to resolve this issue.
I think as you said is STUFF UP! too much now thats should be a good thing Apple might just give me a new one aslong as the can't find out it was jailbroken
 
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f4780y

f4780y

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ok download redsn0w_win_0.9.6rc19 which IPSW osi 5 do I need with that as all the ones I have downloaded are unable to be recongized
 
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ok download redsn0w_win_0.9.6rc19 which IPSW osi 5 do I need with that as all the ones I have downloaded are unable to be recongized

No, you are using the wrong version of redsn0w. You must use the latest 0.9.9b8 - Dev-Team Blog - redsn0w iOS5beta which is linked in the tutorial I pointed you to above.

You do NOT need to provide it with a firmware file.
 
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ok downloaded the right one sorry but when I press jailbrake the Redsnow.exe stops and windows try found a solution
 

Paulbru

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I should have consulted the forum before I upgraded to ios5! Now I have a problem. Several of my applications (like Pages) would not update without ios5. So I connected to iTunes and followed the instructions. At the end end of the process, my iPad did not fully restore. Only the basic factory-loaded applications were restored. None of the applications I bought - like Pages (meaning I've also lost all my documents!). My music and photos were restored, as were my contacts and my notes - but none of the applications I added, whether free or purchased!
Is there any hope that these applications are backed up somewhere on my laptop (PC)? If so, where?
Help!!!
 
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Hi PaulBru if you remember the apps that had purchased iTunes will allow you to re download them for free , but if your talking about Jailbroken apps go here to re download them No links to piracy websites - read the forum rules good luck mate

Edited by Moderator - Gabriel1
 
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penanot

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Thanks for the info Leigh... No more headache for me if i need to boot without computer... :D

Sent from my iPad using iPF
 

misey

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How do I know which version of firmware I should download to my desktop? I have ipad2 wifi and 3G
 
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f4780y

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How do I know which version of firmware I should download to my desktop? I have ipad2 wifi and 3G

It should be the latest (newest) current version, which will always be at the top of the list on the firmware thread which is lined above. Today that is 5.0.1. The list is also segregated into device types. You will need to know whether you have the GSM version (the type that has a micro SIM) or the CDMA version (for use on Verizon in the USA).
 

derekinfrance

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Hi, after trying all sorts of ideas from elsewhere, I came across your advice (against another query). I had to go into FDU mode - and your "DFU mode for Dummies" was made for me (ie a Dummy). Your note on timing is precise and necessary. I cut off too early the first time, but then - hey presto! Thanks to your help my wife now thinks I'm a genius.
 

beno

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i did everything like u said and still 3194 error shows

 

rotation

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Just to clear up:

This tutorial is working without having Apple signing the firmware?
So it is working for all versions where the shsh blobs have been stored for a particular device?
 

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