How to 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. Normally these errors are occurred due to older version of operating system on computer or not able to connect to server or older drivers or hardware cable problem.

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.
• 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