Fix iTunes Errors While Restoring or Updating or Downgrading iPhone

You might see lots of errors or alert messages when you use iTunes to update/upgrade or downgrade or restore your iPhone, iPad or iPod touch. There is another error like iPhone is disabled. I got the question, How To Fix iTunes Error 3194 Can't/Not Restore, Downgrade? how to solve error 3194 occurs during iOS downgrade? Actually, it occurs while updating, restoring or downgrading iOS on your iPhone, iPad or iPod Touch. How To Fix All iTunes Errors on Windows: If you are searching for iTunes error 3194 downgrades then you are on right page. The jailbreak tweaks triggered error while update your old iOS or restore iOS. You may also get the "This device isn't eligible for the requested build" error message if you are trying to update or downgrade your idevice. Normally these errors have occurred due to an older version of operating system on the computer or not able to connect to the server or older drivers or hardware cable problem even you have updated iOS. Learn to fix error 3194 from iTunes during iPhone restore & get more help to resolve with iOS update and restore errors. Troubleshoot 100% working method to solve all ITUNES ERROR on Mac or Windows.

Fix iTunes Errors While Restoring or Updating or Downgrading iPhone

Last time we have seen how to solve Android errors like "Unfortunately app has stopped". But this time we are going to see how get rid of iTunes errors. Learn how to fix iTunes errors 4014, 4016, 3194, 3004, 3194, 1600, 1601, 1602, 1603, 1604, 1611, ? or errors codes 11, 16, 21 etc?

Basic required settings

Need updated iTunes. First get itunes download on laptop.
Need updated operating system.
You should know high speed USB HUB port in your PC to connect your iPhone.
Updated virus data base in your computer�s security software.
Remove extra USB devices.
Once you full fill these settings, you must Restart your system.
Now try to re-connect your iDevice and start again to process.

Advanced Solutions

If you tried these above steps and the error happens again, follow the advanced steps for your error code. Today we are going to see basic but important tips that probably will not benefit many of you, but hopefully, it seems beneficial for few of you those stuck into these kinds of problems, this post will save some time which I have wasted for figuring out all of these errors.

How to Fix iTunes Errors During Update / Downgrade / Restore

Most relevant solution for these error is about your HOST file. Go to gs.apple.com and see what your browser shows. If it shows, TSS or Cydia then you need to update HOST file, because it should show Apple Server Configuration page.

How to edit HOST file

First close the iTunes.
In Windows see the host file located at: C:\windows\system32\drivers\etc\hosts
For Mac users goto: /etc/hosts
After that open the hosts file with Administrator Privileges with notepad.
If not, add the following lines at the bottom of the notepad : 74.208.105.171 gs.apple.com
Save.

Fixing iTunes Errors for a Jailbroken iPhone

If your iDevice is jailbroken or its software is expired then you need to use following tools to update / restore your device.

Basic required tools:

Redsnow [download] - for booting, restoring iOS without iTune
TinyUmbrella [download] - for server errors
iFaith & iReb [download] - for downloading valid SHSH blobs

Fix iTunes errors 4014, 4016, 3194, 3004, 3194

These errors are occurred because of not getting server response.

Connect your device only in pwned DFU mode [Read How to put iPhone in DFU mode at the bottom of this page in bibliography].
Connect iphone to itune and do the restore and update again.

It should work that way for Normal unjailbroken iPhone. But for jailbroken device follow these steps;

Connect your device only in pwned DFU mode [Read How to put iPhone in DFU mode at the bottom of this page in bibliography].
Open TinyUmbrella >> Start TSS Server. Now your iTunes automatically gets closed.
Re-open iTunes. And check. Your error get solved.

Fix iTunes errors 1600, 1601, 1602, 1603, 1604, 1611

These errors are occurred for jailbroken devices particularly when signature checks are get blocked or ApTickets, or GetDeviceID get failed to iBoot.

You must connect your device only in pwned DFU mode [Read How to put iPhone in DFU mode at the bottom of this page in bibliography].
Open iREB >> click on iPhone 4 [even for iPhone 4S, 5, 5s, 5c]. Now your iTunes automatically gets closed.
Re-open iTunes. And check. Your error get solved.

Fix iTunes errors 11, 16

These errors are occurred because of not compatible library files.

You must have iTunes ver 11.1 or above. Here you need to restore working library files [download].
Close iTunes, TinyUmbrella, iREB or any tool if its active.
Open that downloaded file with Administrator Privileges >> follow on screen instruction without hesitation.
Now try to check. Your error is get vanished. Thanks to Sinful.

Bibliography

If you want to update your device OR if your iDevice software is expired OR if you want to downgrade then YOU SHOULD RESTORE it with last working SHSH blobs.

How to restore without iTunes but with Redsnow

Connect your device. Open iFaith with Administrator Privileges >> click on Show Available SHSH caches on Server >> you need to download last working iOS SHSH blobs and note down its compatible iOS version.
Now you need to particularly download that noted iOS compatible for you device.
Once download finished, open Rednow with Administrator Privileges.
Redsnow >> Extra >> Even More >> Restore >> IPSW - select the ipsw file which you downloaded in step 2 >> then click on local - select the SHSH blobs which you downloaded in step 1.
Let the Redsnow perform its operation.
You will see your device is getting restored in few minutes.
Once restored, connect your device to iTunes, your software get alive again.

Now once your iOS on device is working fine then you can update it automatically with its upcoming update version through device itself from Setting >> General >> Software Update.

How to Put iPhone into DFU Mode

Switch off by slide to power off
Now once it got OFF. Hold the power button for 3 seconds
Press and hold the Home and Power buttons for 10 seconds
After this, release the Power button but keep the Home button pressed for 15 seconds
This puts the iPhone in DFU mode. The screen remains black.
When you connect your iPhone to iTunes, a popup tells you that iTunes has detected an iPhone in DFU mode and its required drivers are get installed into you system.

How to Get iPhone Out of DFU Mode

Press and hold Home and Power buttons for about 10-12 seconds
Now, release the Home button but keep pressing the Power button till Apple logo comes up on the screen. Your iPhone is out of DFU mode.