Apple has released iOS 4.2.1.But some iPhone 4 users have reported that they are facing iTunes Error 1013 or 1611 while updating their iPhone 4 to iOS 4.2.1.There is no proper solution available on the Internet and this issue has already been reported to the Apple team.
The steps are given below.
For Mac OS X:
Step 1. Go to your “Applications” folder
Step 2. Go to your “Utilities” folder
Step 3. Launch “Terminal”
Step 4. Type “sudo nano /etc/hosts” (without quotes) and hit return
Step 5. Enter your password
Step 6. Use the down arrow key to find the “gs.apple.com” entries. Once the cursor is in front, make sure you comment out the line(s) by entering “#” (no quotes) in front of the text
Step 7. Save the file by pressing CONTROL+O on the keyboard
Step 8. Exit the nano editor by pressing CONTROL+X on the keyboard
Step 9. Restore your iDevice
Step 1. Start –> Programs –> Accessories
Step 2. Run Notepad or WordPad
Step 3. Click “Open..” from File menu.
Step 4. Browse to Windows/System32/drivers/etc
Step 5. In “files of type:” select all documents
Step 6. Open “hosts”
Step 7. Delete all line that has “gs.apple.com” or something like that
Step 8. Hit Save
Step 9. Restore your device
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